Update sandbox instructions

Add an instruction to sync global-jjb

Change-Id: Icea0d9bd10691c51d83eed115064be4903d98bbf
Issue-ID: CIMAN-65
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>

diff --git a/Sandbox_Setup.md b/Sandbox_Setup.md
index 2d8758f..42ed608 100755 (executable)
--- a/Sandbox_Setup.md
+++ b/Sandbox_Setup.md
@@ -28,6 +28,10 @@ To download **ci-management**, execute the following command to clone the
 `git clone ssh://<LFID>@gerrit.onap.org:29418/ci-management --recursive && scp -p -P 29418 \
 <LFID>@gerrit.onap.org:hooks/commit-msg ci-management/.git/hooks/`
 
+Make sure to sync global-jjb submodule using:
+
+`git submodule update --init`
+
 Once you successfully clone the repository, next step is to install JJB
 (Jenkins Job Builder) in order to experiment with Jenkins jobs.