Revert "Enforce FIB table creation before use"

This reverts commit f9342023c1.

Reverting to unblock master. No idea why jjb +1ed this patch! On closer inspection it looks like it -1ed it and subsequently changed opinion. CSIT tests should be fixed before re-merging. 

Change-Id: I26608912a962c52083073e16c7c9d2cc44a3cc8d
Signed-off-by: Florin Coras <fcoras@cisco.com>

test/test_dvr.py

@@ -83,6 +83,8 @@ class TestDVR(VppTestCase):
                                                   L2_VTR_OP.L2_POP_1,
                                                   93)
 
+        self.logger.error(self.vapi.ppcli("show bridge-domain 1 detail"))
+
         #
         # Add routes to bridge the traffic via a tagged an nontagged interface
         #