Adding back cartridge storage functionality.
Match the new min for scaled php cartridge
Fix RHC Extended test failures.

Due to the recent model refactoring on the broker, we no longer create TXT DNS records.
This is used in the "Then" clauses of the failing Cucumber scenarios, which should now simply return true.
Merge pull request #285 from jtharris/features/US2438_redux

Merged by openshift-bot
Merge pull request #286 from BanzaiMan/dev/hasari/fix_rhc_extended

Merged by openshift-bot