Clean up apache 2.2 cruft from Ubuntu 12.04
Clean up apache 2.2 cruft from Ubuntu 12.04

All the apache 2.2 handling is obsolete now, as we don't support those
distros, so get rid of it.

Change-Id: I9c0f78af2b32afabb2c4264aebc92089c4694f91

nawawi/openstack,richliu/devstack,group-policy/devstack,nawawi/openstack,richliu/devstack,group-policy/devstack,dtroyer/devstack,openstack-dev/devstack,openstack-dev/devstack,noironetworks/devstack,noironetworks/devstack,dtroyer/devstack