Now, we can't use os-fping API by default because devstack doesn't
install the fping package.
This commit adds installing the package and enabling to use os-fping
API.
Change-Id: Ibdc7479a9038321e4fc3953774a6f3e1dac90530
Closes-Bug: #1287468
Highlights:
* Add files/rpms/*
* get_packages() only loads deps for services that are enabled
11Apr2012
* change mod_wsgi cwd to $HORIZON_DIR
* fix horizon apache log file name and location
Note: This superceeds https://review.openstack.org/4364
Change-Id: I95486584561e4418907a6a4feb0ffbe4f4ea1843