certmonger: add support for MS V2 template
    
    Update certmonger.resubmit_request() and .modify() to support
    specifying the Microsoft V2 certificate template extension.
    
    This feature was introduced in certmonger-0.79.5 so bump the minimum
    version in the spec file.
    
    Part of: https://pagure.io/freeipa/issue/6858
    
    Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>