Add a generic post-prereq phase

This generic extra phase is handy for fixing up things like python
modules after pip is installed or other distro specific requirements.

Change-Id: I4a68b830cd98c6f93191dac1edd7de2a0381feaa
Add rhel6 as an allowed distro

Add RHEL6 based distributions as a valid install target

Change-Id: I89fb68d18a0d2079493be93b230162679123881d
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
Set the port of S3_URL to 8080 with swift3 enabled

Fixes: bug #1171608
The value of the port defaults to 3333 which is the
default for nova-objectstore.

Change-Id: If87df6a765bcfc4d467628411dceec72d5af412e
Merge "Add rhel6 as an allowed distro"
Merge "Add a generic post-prereq phase"
Merge "Set the port of S3_URL to 8080 with swift3 enabled"
Move auth_token config to .conf, key cache directories

auth_token configuration can now be read from the conf files
rather than the paste.ini files.

A key cache directory has been created for each of the 3 API services
under /var/cache/heat

This is the devstack change relating to
Heat Blueprint: keystone-middleware

This is related to this committed change:
https://review.openstack.org/#/c/26351/

Devstack users will find Heat to be broken until this corresponding change
is approved.

Change-Id: If6f77f86a3eeb08a58b516725bd806e39ccedb50
Move ec2authtoken config from paste.ini to conf

Nothing now needs to be configured in paste.ini on launch

This change relates to these committed Heat changes:
https://review.openstack.org/#/c/27382/
https://review.openstack.org/#/c/27382/

Change-Id: Ia29dee8e32cd3d43d1b9200dd94de70e02a54bfc
Install api-paste.ini and policy.json

This is related to this Heat change, and Heat on Devstack will not work
while only one of these changes is applied:
Consolidated api-paste.ini file
https://review.openstack.org/#/c/27384/

Change-Id: Iba02b56173f796de5348289247233c8765f83ac2
fix support for VMware vCenter Driver

Change-Id: Iedd26dbb89731f49718604eb09eb84b3e0b648c0
Merge "Move auth_token config to .conf, key cache directories"
Merge "Modify RPM lists for RHEL6"
Removes "RPC not enabled" error message when no backend is needed

When no service needing a RPC backend is activated, no error message
should appear if a RPC backend is not installed. A simple check is
done on the services installation files to see which services need to
initialize a RPC backend at some point; if none of these services
are in ENABLED_SERVICES then the error message is skipped.

Change-Id: I4e47e0c675c74775b4ea53a00848ac1d777f0125
Fixes: bug #1167338
Remove unused post-prereq phase

This phase was going to be part of RHEL6 support, but is no longer
necessary

Change-Id: I8614710b35db018dcf9d906e0af70e4f6b8c7191
Merge "fix support for VMware vCenter Driver"
Merge "Remove unused post-prereq phase"
Merge "Removes "RPC not enabled" error message when no backend is needed"
Merge "Move ec2authtoken config from paste.ini to conf"
Merge "Install api-paste.ini and policy.json"