ipatests: increase sosreport verbosity
    
    With the new version sos-4.2-1, sos report -v prints the
    debug messages into sos.log only. In order to see the debug
    messages in the console, -vv is needed.
    For more info refer to sos report commit
    https://github.com/sosreport/sos/commit/1d0729a9dcfe3f3cebb961114c9bc05136cf8cfb
    
    Since the test is looking for messages in stdout, use -vv to
    make sure the expected messages are printed in the console.
    
    Fixes: https://pagure.io/freeipa/issue/9000
    Reviewed-By: Mohammad Rizwan Yusuf <myusuf@redhat.com>