Added integration test to Makefile.

Makefile

@@ -49,6 +49,7 @@ integration_test:
 	cd test ; echo "rowcache_invalidator test"; time ./rowcache_invalidator.py
 	cd test ; echo "secure test"; time ./secure.py $$VT_TEST_FLAGS
 	cd test ; echo "resharding test"; time ./resharding.py $$VT_TEST_FLAGS
+	cd test ; echo "vtdb test"; time ./vtdb_test.py $$VT_TEST_FLAGS
 
 clean:
 	cd go/cmd/mysqlctl; go clean