Update git submodules

* Update plugins/replication from branch 'master'
  to 7a130c30c42ca8bc1e8858513ee8643ca6041b3a
  - Get a URI lock before running tasks.
    
    This allows more than one related gerrit process (as in multi-master
    situations) to access the persistent task store at the same time without
    deleting each other's task files. This also prevents more than one gerrit
    process from pushing to the same URI at the same time.
    
    Change-Id: I1f3f4d60605ff21038e722553cb38494e18b9ff9
    
diff --git a/plugins/replication b/plugins/replication
index 51750ca..7a130c3 160000
--- a/plugins/replication
+++ b/plugins/replication
@@ -1 +1 @@
-Subproject commit 51750cae8ba3c68bcefedbe8b05faabf9ea5ada4
+Subproject commit 7a130c30c42ca8bc1e8858513ee8643ca6041b3a