Moved core int-test groups from trove-int to trove

Cleaned up int-test dependencies so that the core int-test groups
are now registered entirely from trove python module. This enables
adding new int-tests for features in trove without creating a cross
repository dependency on trove-integration.

Change-Id: I8ed85d5cb488c402c86b72c4f3cc23389098aa83
Partial-bug: 1343584
Merge "Moved core int-test groups from trove-int to trove"