b68d383 frontend: assure unique Copr name for group/user in DB

Authored and Committed by praiskup a year ago
    frontend: assure unique Copr name for group/user in DB
    
    Fix the testsuite -- don't change the ownership of the 'c1', that leads
    to situation that user 'u2' owns two coprs of 'foocopr' name.
    
    Fixes: #172