Update CSIT tests 171204 -> 171218

- update of CSIT operational branch to be used for VPP-patch test

Change-Id: I5ad0e36fa40095cc107a31b32dd2bbf936636dc4
Signed-off-by: Jan Gelety <jgelety@cisco.com>
diff --git a/build-root/scripts/csit-test-branch b/build-root/scripts/csit-test-branch
index dfd5fa5..9188d8c 100755
--- a/build-root/scripts/csit-test-branch
+++ b/build-root/scripts/csit-test-branch
@@ -1,2 +1,2 @@
 #!/bin/sh
-echo oper-171204
+echo oper-171218