networking-l2gw debian packaging and installation

script to create and install debian package for networking-l2gw,
and for enabling neutron-l2gateway plugin.

Change-Id: Ic3bd755ad19db03d6ebc89d0da6c1da08b34d33a

contrib/README_install_and_config_l2gateway_plugin.rst

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+Debian packaging, installation and configuration of
+neutron-l2gateway plugin.
+
+Prior requirements
+script install_and_config_l2gateway_plugin.sh will run on openstack controller.
+
+install_and_config_l2gateway_plugin.sh will create and install debian package of networking-l2gw,
+and it will enable neutron-l2gateway service plugin.
+
+Creation of debian package requires copyright, changelog, control, compat
+and rules file inside the debian folder.
+debian folder is to be placed inside the folder which needs to be packaged (networking-l2gw).
+command dpkg-buildpackage -b, builds debian package of networking-l2gw which uses the files
+mentioned inside debian folder to create debian package.
+
+please refer https://www.debian.org/doc/manuals/maint-guide/dreq.en.html
+for further details.
+
+Installation procedure example:
+
+The script will ask for further details for packaging and installing as shown below.
+press ENTER for assigning default values to debian/changelog and debian/control file.
+
+#info for debian/changelog file
+enter package name for debian/changelog
+networking-l2gw
+enter package version for debian/changelog
+1.0
+
+#info for debian/control file
+enter the networking-l2gw source name
+networking-l2gw
+enter the networking-l2gw package name
+networking-l2gw
+enter the version number
+1.0
+enter the maintainer info
+user@hp.com
+enter the architecture
+all
+enter the description title
+l2gateway package
+enter the description details
+description details of l2gateway package
+
+#info of neutron.conf file path
+press ENTER for assigning default file path /etc/neutron/neutron.conf for neutron.conf file.
+enter neutron.conf file path
+/etc/neutron/neutron.conf
+
+after execution of install_and_config_l2gateway_plugin.sh
+check neutron-server status.
+
+sudo service neutron-server status
+neutron-server start/running, process 17876
+
+and also check service_plugins in neutron.conf file whether 
+networking_l2gw.services.l2gateway.plugin.L2GatewayPlugin is enabled or not.

contrib/install_and_config_l2gateway_plugin.sh

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+#!/bin/bash
+# Copyright (c) 2015 OpenStack Foundation.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License
+
+if [ $(id -u -r) -ne 0 ]
+then
+        echo "Requires root privileges. Please re-run using sudo."
+        exit 1
+fi
+apt-get update -y
+apt-get install devscripts -y
+apt-get install debhelper -y
+apt-get install dh-make -y
+#read the package name and version,if not take default values and enter to
+#debian/changelog file.
+cd ..
+if [ -f "debian/changelog" ]
+then
+   echo info for debian/changelog file
+   echo enter package name for debian/changelog
+   read pck
+   sed -i 's/PACKAGE/'${pck:-networking-l2gw}'/' debian/changelog
+   echo enter package version for debian/changelog
+   read pck_ver
+   sed -i 's/VERSION/'${pck_ver:-1.0}'/' debian/changelog
+fi
+#control file contains various values which dpkg, dselect, apt-get, apt-cache, aptitude,
+#and other package management tools will use to manage the package.
+#It is defined by the Debian Policy Manual, 5 "Control files and their fields".
+if [ -f "debian/control" ]
+then
+    echo info for debian/control file
+    echo enter the networking-l2gw source name
+    read src_name
+    echo enter the networking-l2gw package name
+    read pck_name
+    echo enter the version number
+    read ver
+    echo enter the maintainer info
+    read maintainer_info
+    echo enter the architecture
+    read architecture
+    echo enter the description title
+    read description
+    echo enter the description details
+    read description_details
+    sed -i 's/source/'${src_name:-networking-l2gw}'/' debian/control
+    sed -i 's/package/'${pck_name:-networking-l2gw}'/' debian/control
+    sed -i 's/version/'${ver:-1.0}'/' debian/control
+    sed -i 's/maintainer/'${maintainer_info:-user@openstack}'/' debian/control
+    sed -i 's/arch/'${architecture:-all}'/' debian/control
+    sed -i 's/desc/'${description:-networking-l2gw}'/' debian/control
+    sed -i 's/desc_details/'${description_details:-networking-l2gw}'/' debian/control
+fi
+#dpkg-buildpackage, build binary or source packages from sources.
+#-b Specifies a binary-only build, no source files are to be built and/or distributed.
+echo building debian package
+dpkg-buildpackage -b
+cd ../
+if [ -z "$pck_name" ]
+then
+pck_name="networking-l2gw"
+fi
+if [ -z "$pck_ver" ]
+then
+pck_ver=1.0
+fi
+if [ -z "$architecture" ]
+then
+architecture="all"
+fi
+echo installing $pck_name\_$pck_ver\_$architecture.deb
+dpkg -i  $pck_name\_$pck_ver\_$architecture.deb
+echo enter neutron.conf file path
+read neutron_conf
+l2gw_plugin=", networking_l2gw.services.l2gateway.plugin.L2GatewayPlugin"
+while read line
+do
+if [[ $line == *"service_plugins"* ]]
+then
+   if [[ $line != *$l2gw_plugin* ]]
+   then
+   serv_plugin=$line$l2gw_plugin
+   sed -i "s|$line|$serv_plugin|" ${neutron_conf:-/etc/neutron/neutron.conf}
+   fi
+fi
+done <${neutron_conf:-/etc/neutron/neutron.conf}
+service neutron-server restart