On rbintegrations 2.0, the Travis CI test suite contained a duplicate

copy of _create_repository() and a truncated overridden version of

_create_config(). This caused issues running unit tests, since

_create_config() would outright fail and the primary

_create_repository() (which has fixes coming in from release-1.0.x)

wouldn't apply.
This was likely due to a bad merge. There's nothing in the overridden

copies worth keeping.
This change gets rid of those versions.

Unit tests pass when running against Review Board 3.0 and 4.0.