Bug #1007153

XS should not have the centos repo enabled by quantum this can break the system, also is possible to get the sqlalchemy from epel and avoid unneeded packages on the system.

Using epel rpm and leave it disabled after use

Change-Id: If6673e59afc545e51df3625d8259ec3fca9aaefb

quantum/plugins/openvswitch/agent/xenserver_install.sh

@@ -7,10 +7,12 @@ if [ ! -d /etc/xapi.d/plugins ]; then
 	exit 1
 fi
 
-sed -i -e 's/enabled=0/enabled=1/' /etc/yum.repos.d/CentOS-Base.repo
+rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm
 
-yum -y install python-setuptools gcc gcc-c++ MySQL-python
-easy_install pip && pip install sqlalchemy
+yum --enablerepo=epel -y install python-sqlalchemy0.5
+yum --enablerepo=base -y install MySQL-python
+
+sed -i 's/enabled=1/enabled=0' /etc/yum.repos.d/epel.repo
 
 cp ovs_quantum_agent.py /etc/xapi.d/plugins
 cp ovs_quantum_plugin.ini /etc/xapi.d/plugins