internal user-interaction: Enable 2 consecutive test suites on seperate VOs #25

[patrick-austin]

Enable 2 consecutive test suites on seperate VOs

Updated the multi-VO Travis suite to run twice on two VOs (tst and ts2) without clearing the DB (but the cache is cleared as otherwise we wouldn't pick up newly added RSEs - this is not an exclusively multi-VO issue), along with some other modifications needed to make this work:

• Removed hardcoding for tst during tests; now use config_get() and modify rucio.cfg between tests

• Changed how we clear the cache in the test scripts as Travis doesn't have netcat/nc

• Improved exception handling in sync_meta.py to identify duplication so it's more in line with other files

• Added VO to a number of replica functions: list_bad_replicas_status, get_pfn_to_rse, declare_bad_file_replica, get_bad_replicas_summary and get_did_from_pfns

This is dependent on issue #60 / PR #63 as we need to store the clientside tokens by VO in order to run the successive tests.

[elichad]

There's a new test file tests/test_reaper2.py which will also need updating to the new format.