Fix Strainerfile

Change-Id: I2c14ca507559f422f5e8b89801add68d1ce35ab8
Implements: blueprint per-repo-tests
Copy in keystone paste if platform_family is RHEL

The openstack-keystone package on RHEL does not include
/etc/keystone/keystone-paste.ini, so if we do not manage this file then
just copy it into /etc/keystone from
/usr/share/keystone/keystone-dist-paste.ini.

Change-Id: Ie85701cdae8b7fa93b8fe7d06423c491aafafd88
Closes-Bug: #1327130
add possible service_types for Trove and Sahara

The cookbook names will be database and data-processing respectively.

Change-Id: I4e20c2246949a96f4ef0eb943b5d197edf28fb04