Added test automation for SHA384withRSA CSR support
    
    Scenario 1:
    Setup master with --ca-signing-algorithm=SHA384withRSA
    Run certutil and check Signing Algorithm
    
    Scenario 2:
    Setup a master
    Stop services
    Modify default.params.signingAlg in CS.cfg
    Restart services
    Resubmit cert (Resubmitted cert should have new Algorithm)
    
    Pagure Link: https://pagure.io/freeipa/issue/8906
    
    Signed-off-by: Sumedh Sidhaye <ssidhaye@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Antonio Torres <antorres@redhat.com>