ip: convert u32 entry_flags to vl_api_mfib_entry_flags_t on mroute API

Type: fix

This is not an API change, it's the same values, just a different named
type.
also use VppEnum values in tests

Signed-off-by: Neale Ranns <nranns@cisco.com>
Change-Id: I3a18b529514f3cc9467ae4e8ac3e88d067fc776b
diff --git a/src/vnet/ip/ip_api.c b/src/vnet/ip/ip_api.c
index 3f593c6..448b36c 100644
--- a/src/vnet/ip/ip_api.c
+++ b/src/vnet/ip/ip_api.c
@@ -745,6 +745,7 @@
 {
   fib_route_path_t *rpath, *rpaths = NULL;
   fib_node_index_t mfib_entry_index;
+  mfib_entry_flags_t eflags;
   mfib_prefix_t pfx;
   u32 fib_index;
   int rv;
@@ -769,10 +770,11 @@
 	goto out;
     }
 
+  eflags = mfib_api_path_entry_flags_decode (mp->route.entry_flags);
   mfib_entry_index = mroute_add_del_handler (mp->is_add,
 					     mp->is_add,
 					     fib_index, &pfx,
-					     ntohl (mp->route.entry_flags),
+					     eflags,
 					     ntohl (mp->route.rpf_id),
 					     rpaths);