Fix Neutron configuration if Ceilometer is enabled

Previously if Ceilometer service was enabled,
configuration option to enable Neutron network
notifications was not set. This fixes it.

Change-Id: Ia53d9db1828ef2daa0ce637b2a2635795856502c
Closes-Bug: #1340754
FAQ: Clarification - Devstack is a gating project

Change-Id: I52fdfc5c865e864939df49fecb71b8e615a28cbf
Make apache restarts a little more forgiving

Apache sometimes is slow to release the port (from the kernel's
perspective) which can cause restarts of apache to fail due to the
requested port already being bound. This fix introduces a small sleep
between the stop and start to help make apache deployments a bit
more resilient.

Change-Id: I9697d71f3cb2d8d5da8fe7ffa8b3e1ade9d52afd
Closes-Bug: #1342256
Merge "Fix Neutron configuration if Ceilometer is enabled"
Merge "FAQ: Clarification - Devstack is a gating project"
Merge "Make apache restarts a little more forgiving"