'go mod' related fixes

change path on voltha-bbsim (uses 'go mod')
Detect and run dep on 'go mod' based synopsys jobs
Remove periodic check on CORD, as it gets post-merge checks

Change-Id: Icb64ff899cd2947479a5981fe90ece5b766b7b2c
diff --git a/jjb/opencord.yaml b/jjb/opencord.yaml
index cf23aea..a6668ae 100644
--- a/jjb/opencord.yaml
+++ b/jjb/opencord.yaml
@@ -8,8 +8,8 @@
     blackduck-project: cord
 
     jobs:
-      - 'synopsys-periodic-check':
-          build-node: "ubuntu16.04-basebuild-2c-4g"
-          git-server-url: "{gerrit-server-url}"
+#     - 'synopsys-periodic-check':
+#         build-node: "ubuntu16.04-basebuild-2c-4g"
+#         git-server-url: "{gerrit-server-url}"
       - 'synopsys-merge-check'