Move all cinder-common tests into cinder-common_spec

The cinder.conf template resource exists in the cinder-common recipe,
and therefore all tests for that template should sit in the cinder-common_spec

Also, this removes a duplicated test that was in both (syslog config)

Change-Id: I00add345d961eb4502ec9dc9a3b8e7b29096ff7c
Merge "Move all cinder-common tests into cinder-common_spec"