removed unused variable 'registry_port'

The unused variable 'registry_port' has been removed from function
'test_cache_manage_delete_cached_images'

Fixes bug 1201585

Change-Id: Ib438989f2dd00952a1a1647c101269055088ddaa
index checksum image property

checksum image property will be indexed so that users can search for an
image by specifying the checksum

Change-Id: I31543afed31512f8f5f613640012bc7c1d7ea993
Implements: blueprint index-using-checksum-image-property
Merge "removed unused variable 'registry_port'"