since moving from post-review to rbt-post, find_server_repository_info is no more used.

It was very useful to check repository for clearcase SCM tool (and also implemented for SVN)
Fix also ClearCaseRepositoryInfo call from clearcase.py (3rd parameter is vobstag, I suppose "uuid" was an old copy paste from svn implementation

can post review request from any clearcase vob using rbt post 0.5.x
tested on release-0.5.x => rbt post works but breaks post-review

so my proposal would will be to import it in release-0.6.x and then find a way to backport it to 0.5.x (requires to make find_server_repository_info compatible with both post-review old ReviewboardSever class) and rbt-post  (usage of api_root)
not able to test on svn side, so fix repositories loop without any test. If someone can check for SVN regression, would be great