Add devstack plugin to ease integration tests

Instead of requiring users to install the plugin manually, add a
devstack plugin that can be enabled in order to perform the
installation.

Change the integration tests to use the globally installed plugin
instead of using TEMPEST_PLUGINS.

Change-Id: I7282fa60db15427c73dfef84a40093904e083db2

devstack/README.rst

@@ -0,0 +1,21 @@
+====================
+Enabling in Devstack
+====================
+
+**WARNING**: the stack.sh script must be run in a disposable VM that is not
+being created automatically, see the README.md file in the "devstack"
+repository.  See contrib/vagrant to create a vagrant VM.
+
+1. Download DevStack::
+
+    git clone https://git.openstack.org/openstack-dev/devstack.git
+    cd devstack
+
+2. Add this repo as an external repository::
+
+     > cat local.conf
+     [[local|localrc]]
+     enable_plugin neutron-tempest-plugin https://git.openstack.org/openstack/neutron-tempest-plugin
+
+3. run ``stack.sh``
+

devstack/plugin.sh

@@ -0,0 +1,13 @@
+# install_neutron_tempest_plugin
+function install_neutron_tempest_plugin {
+    setup_dev_lib "neutron-tempest-plugin"
+}
+
+if [[ "$1" == "stack" ]]; then
+    case "$2" in
+        install)
+            echo_summary "Installing neutron-tempest-plugin"
+            install_neutron_tempest_plugin
+            ;;
+    esac
+fi

devstack/settings

@@ -0,0 +1,3 @@
+GITREPO["neutron-tempest-plugin"]=${NEUTRON_TEMPEST_REPO:-${GIT_BASE}/openstack/neutron-tempest-plugin.git}
+GITDIR["neutron-tempest-plugin"]=$DEST/neutron-tempest-plugin
+GITBRANCH["neutron-tempest-plugin"]=master

playbooks/neutron-tempest-plugin-api/run.yaml

@@ -23,27 +23,17 @@
         chdir: '{{ ansible_user_dir }}/workspace'
       environment: '{{ zuul | zuul_legacy_vars }}'
 
-    - shell:
-        cmd: |
-          set -e
-          set -x
-          cat << 'EOF' >>"/tmp/dg-local.conf"
-          [[local|localrc]]
-          TEMPEST_PLUGINS='/opt/stack/new/neutron-tempest-plugin'
-          EOF
-        executable: /bin/bash
-        chdir: '{{ ansible_user_dir }}/workspace'
-      environment: '{{ zuul | zuul_legacy_vars }}'
-
     - shell:
         cmd: |
           set -e
           set -x
           export PYTHONUNBUFFERED=true
           export DEVSTACK_GATE_TEMPEST=1
+          export DEVSTACK_GATE_TEMPEST_ALL_PLUGINS=1
           export DEVSTACK_GATE_NEUTRON=1
           export DEVSTACK_GATE_EXERCISES=0
           export DEVSTACK_GATE_TEMPEST_REGEX="neutron_tempest_plugin.api"
+          export DEVSTACK_LOCAL_CONFIG="enable_plugin neutron-tempest-plugin git://git.openstack.org/openstack/neutron-tempest-plugin"
           export BRANCH_OVERRIDE=default
           if [ "$BRANCH_OVERRIDE" != "default" ] ; then
               export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE

playbooks/neutron-tempest-plugin-dvr-multinode-scenario/run.yaml

@@ -23,27 +23,17 @@
         chdir: '{{ ansible_user_dir }}/workspace'
       environment: '{{ zuul | zuul_legacy_vars }}'
 
-    - shell:
-        cmd: |
-          set -e
-          set -x
-          cat << 'EOF' >>"/tmp/dg-local.conf"
-          [[local|localrc]]
-          TEMPEST_PLUGINS='/opt/stack/new/neutron-tempest-plugin'
-          EOF
-        executable: /bin/bash
-        chdir: '{{ ansible_user_dir }}/workspace'
-      environment: '{{ zuul | zuul_legacy_vars }}'
-
     - shell:
         cmd: |
           set -e
           set -x
           export PYTHONUNBUFFERED=true
           export DEVSTACK_GATE_TEMPEST=1
+          export DEVSTACK_GATE_TEMPEST_ALL_PLUGINS=1
           export DEVSTACK_GATE_NEUTRON=1
           export DEVSTACK_GATE_CONFIGDRIVE=0
           export DEVSTACK_GATE_TEMPEST_REGEX="(neutron_tempest_plugin.scenario)"
+          export DEVSTACK_LOCAL_CONFIG="enable_plugin neutron-tempest-plugin git://git.openstack.org/openstack/neutron-tempest-plugin"
           export TEMPEST_CONCURRENCY=2
           # Test DVR works multinode
           export DEVSTACK_GATE_NEUTRON_DVR=1

playbooks/neutron-tempest-plugin-scenario-linuxbridge/run.yaml

@@ -31,7 +31,6 @@
           [[local|localrc]]
           Q_AGENT=linuxbridge
           PHYSICAL_NETWORK=default
-          TEMPEST_PLUGINS='/opt/stack/new/neutron-tempest-plugin'
 
           EOF
         executable: /bin/bash
@@ -44,9 +43,11 @@
           set -x
           export PYTHONUNBUFFERED=true
           export DEVSTACK_GATE_TEMPEST=1
+          export DEVSTACK_GATE_TEMPEST_ALL_PLUGINS=1
           export DEVSTACK_GATE_NEUTRON=1
           export DEVSTACK_GATE_EXERCISES=0
           export DEVSTACK_GATE_TEMPEST_REGEX="(neutron_tempest_plugin.scenario)"
+          export DEVSTACK_LOCAL_CONFIG="enable_plugin neutron-tempest-plugin git://git.openstack.org/openstack/neutron-tempest-plugin"
           export BRANCH_OVERRIDE=default
           if [ "$BRANCH_OVERRIDE" != "default" ] ; then
               export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE