Modify RPM lists for RHEL6

Modifications to the RPM list to make devstack work on RHEL6.  Makes
various packages only install on Fedora distros; generally letting pip
install the missing dependencies on RHEL.

Additionally the Qpid package name is different in RHEL6 to Fedora.
Also a small re-write of the config file is required to avoid
authenication issues.

Change-Id: If497099d27aa9cd80e1c1cee1aff2ed6b076d309
diff --git a/files/rpms/horizon b/files/rpms/horizon
index 12f75ba..151e7e2 100644
--- a/files/rpms/horizon
+++ b/files/rpms/horizon
@@ -17,8 +17,8 @@
 python-mox
 python-netaddr
 python-nose
-python-paste
-python-paste-deploy
+python-paste        #dist:f16,f17,f18
+python-paste-deploy #dist:f16,f17,f18
 python-pep8
 python-routes
 python-sphinx