Ticket 49086 - public api compatability test for SDN changes.
    
    Bug Description:  In order to resolve the SDN premangaling issue, we need to
    assert that as we change the pblock and operation code we do not violate our
    api behaviours.
    
    Fix Description:  This adds a set of initial tests to assert the behaviours of
    the plugin v3 api via the pblock, and partially via the internal operation
    api. With this set of tests, changes to the pblock structures and pointers can
    be asserted to "behave the same way", which means we will keep the public api
    working for existing plugins.
    
    https://fedorahosted.org/389/ticket/49086
    
    Author: wibrown
    
    Review by: mreynolds (Thanks!)