Add global-refdb dependency to the high-availability plugin

The high-availability plugin depends on the global-refdb
libModule source.

Change-Id: I58830735c1329aecf4bcd7e2729a281a04f21994
diff --git a/jenkins/gerrit-bazel-plugin-high-availability.yaml b/jenkins/gerrit-bazel-plugin-high-availability.yaml
index 2af9077..0f3c439 100644
--- a/jenkins/gerrit-bazel-plugin-high-availability.yaml
+++ b/jenkins/gerrit-bazel-plugin-high-availability.yaml
@@ -2,6 +2,7 @@
     name: high-availability
     jobs:
       - 'plugin-{name}-bazel-{branch}':
+          extra-modules: 'global-refdb'
           branch:
             - master
             - stable-3.8