Build Javamelody as simple Bazel plugin on master

Change-Id: Ia5d65f9794d4204cae9a5899a2beca4fc7aefbfe
diff --git a/jenkins/gerrit-buck-bazel-plugin-javamelody.yaml b/jenkins/gerrit-buck-bazel-plugin-javamelody.yaml
index b60ba91..9276446 100644
--- a/jenkins/gerrit-buck-bazel-plugin-javamelody.yaml
+++ b/jenkins/gerrit-buck-bazel-plugin-javamelody.yaml
@@ -27,10 +27,12 @@
             plugins/javamelody:javamelody \
       - 'plugin-javamelody-bazel-{branch}':
           branch:
-            - master
             - stable-2.14
             - stable-2.15
             - stable-2.16
           targets: >
             plugins/javamelody:javamelody-deps_deploy.jar
             plugins/javamelody:javamelody \
+      - 'plugin-{name}-bazel-{branch}':
+          branch:
+            - master