Fix bug with member assignment order in PushReplication.

The groupCache was being used before it was set in the class. Fix the
ordering of the assignment.

Change-Id: I969c2c9e51934cc01e0b4983a7c884d8f88fb34f
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/git/PushReplication.java b/gerrit-server/src/main/java/com/google/gerrit/server/git/PushReplication.java
index 5bff0ad..05032b7 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/git/PushReplication.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/git/PushReplication.java
@@ -113,8 +113,8 @@
     database = db;
     replicationUserFactory = ruf;
     gitRepositoryManager = grm;
-    configs = allConfigs(site);
     groupCache = gc;
+    configs = allConfigs(site);
   }
 
   @Override