update the 1.11 to 1.12 upgrade schema for BDR
    
    in Fedora we are trying to use BDR to make the koji db more resilient
    in order to get the schema to apply I had to make some changes in
    order for the schema changes to be applied.
    see http://bdr-project.org/docs/stable/ddl-replication-statements.html
    for more info there is examples that matched what we are doing at the
    bottom of the page  in the section "8.2.3. DDL statements with
    restrictions"
    
    Signed-off-by: Dennis Gilmore <dennis@ausil.us>