Adapt localrefdb script to Gerrit v3.10.0

The PluginCommandModule has a different constructor in Gerrit v3.10
therefore the command module fo the localrefdb script needs amending.

Change-Id: Ia8d445f38b0085eeb27304f70a7c202201f37e9a

multi-primary/localrefdb.groovy

diff --git a/multi-primary/localrefdb.groovy b/multi-primary/localrefdb.groovy
index cdcf864..a219377 100644
--- a/multi-primary/localrefdb.groovy
+++ b/multi-primary/localrefdb.groovy
@@ -198,6 +198,12 @@
 }
 
 class LocalRefDbCommandModule extends PluginCommandModule {
+
+  @Inject
+  LocalRefDbCommandModule(@PluginName String pluginName) {
+    super(pluginName);
+  }
+
   protected void configureCommands() {
     command(CountRefs)
     command(Sha1AllRefs)