ClearCaseRepositoryInfo.update_from_remote resolved local VOB tags by

running "cleartool lsvob -s -family <uuid> -region <region>" once for

every combination of configured VOB UUID and registry region. On

installations with many regions and VOBs this is hundreds of

serialized cleartool invocations on every rbt run, which is slow.
It now lists all VOBs in each region once with

cleartool lsvob -l -region <region> and matches them to the configured

UUIDs by parsing the family UUID out of the output. This scales with the

number of regions instead of regions * VOBs.

Ran unit tests.