correct svn branch detection
correct svn branch detection

The previous code didn't actually remove the tags from the list of
svn_branches.  As a result you could get failures for a non-existant
branch (because it was just deleted in the fix_tags code).

fredpalmer/svn2git,Muktesh01/svn2git,opoplawski/svn2git,aucampia/svn2git,nirvdrum/svn2git,ritusingh161291/svn2git_ritu_repo