Make sign-artifacts only for maven-stage

This maven-docker-stage job does not need
to run sigul right now since the job only
tries to sign JAVA artifacts and not docker
images.

Issue-ID: CIMAN-33
Signed-off-by: Vanessa Rene Valderrama <vvalderrama@linuxfoundation.org>
Change-Id: I778f0b0b0fdeb080a3370fbd4fc5b876a3bfeb73
diff --git a/jjb/ccsdk/sli-plugins.yaml b/jjb/ccsdk/sli-plugins.yaml
index 24ed996..ca5deee 100644
--- a/jjb/ccsdk/sli-plugins.yaml
+++ b/jjb/ccsdk/sli-plugins.yaml
@@ -7,8 +7,8 @@
       - '{project-name}-{stream}-merge-java'
       - gerrit-maven-stage:
           build-node: centos7-builder-4c-4g
+          sign-artifacts: true
 
-    sign-artifacts: true
     project: 'ccsdk/sli/plugins'
     stream:
       - 'master':