GBP Endpoint Updates

- common types on the API
- endpoints keyed in various ways for DP lookup
- conparison functions for VPP IP address types

Change-Id: If7ec0bbc5cea71fd0983fe78987d147ec1bd7ec8
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>

test/test_bfd.py

@@ -20,7 +20,8 @@ from vpp_pg_interface import CaptureTimeoutError, is_ipv6_misc
 from vpp_lo_interface import VppLoInterface
 from util import ppp
 from vpp_papi_provider import UnexpectedApiReturnValueError
-from vpp_ip_route import VppIpRoute, VppRoutePath, DpoProto
+from vpp_ip import DpoProto
+from vpp_ip_route import VppIpRoute, VppRoutePath
 
 USEC_IN_SEC = 1000000