Revert "ipsec: VPP-1316 calculate IP/TCP/UDP inner checksums"

This reverts commit a98346f664.

Change-Id: Iee5b3a5ddff0e8fd3a30fe5973cee24de434fe12
Signed-off-by: Ole Troan <ot@cisco.com>

test/discover_tests.py

@@ -30,7 +30,7 @@ def discover_tests(directory, callback):
                 continue
             if not issubclass(cls, unittest.TestCase):
                 continue
-            if name == "VppTestCase" or name.startswith("Template"):
+            if name == "VppTestCase":
                 continue
             for method in dir(cls):
                 if not callable(getattr(cls, method)):