Update synergy scheduler manager packaging

This fix updates the packaging of synergy scheduler manager making it compliant with the indigo-2 requirements.

Change-Id: I7b74952a635cf097eb7c8d3d14176fa39dc43c74
Sem-Ver: bugfix

packaging/README.md

@@ -5,14 +5,14 @@
 1. build the image
 
   ```shell
-  cd packaging/docker/{ubuntu-14.04,centos7}
-  docker build -t scheduler-builder-{centos7,ubuntu-14.04} .
+  cd packaging/docker/{ubuntu-16.04,centos7}
+  docker build -t scheduler-builder-{centos7,ubuntu-16.04} .
   ```
 
 2. run the image
 
   ```shell
-  Docker run -i -v /path/to/synergy-scheduler-manager:/tmp/synergy scheduler-builder-{centos7,ubuntu-14.04}
+  Docker run -i -v /path/to/synergy-scheduler-manager:/tmp/synergy scheduler-builder-{centos7,ubuntu-16.04}
   ```
   the deb/rpm will be output in `path/to/synergy-scheduler-manager/build`
 

packaging/docker/centos7/Dockerfile

@@ -1,6 +1,6 @@
 FROM centos:7
 MAINTAINER Vincent Llorens <vincent.llorens@cc.in2p3.fr>
-RUN yum install -y centos-release-openstack-liberty \
+RUN yum install -y centos-release-openstack-newton \
                    git-core \
                    rpm-build \
                    python-devel \