abrt-cli: add abrt-cli tests
    
    5-abrt-cli-test.sh
    Tests reporter-mantisbt on mock version of the MantisBT.
    
    10-abrt-cli-reporting-test.sh
    Tests reporting to the MantisBT via abrt-cli.
    
    Signed-off-by: Matej Habrnal <mhabrnal@redhat.com>