Close ReceiveCommands in OpenRepo when created ad-hoc

When an OpenRepo instance is initialized via its static open() method,
the ChainReceiveCommands are instantiated internally
(i.e., not provided by the caller).
Since these commands are managed within OpenRepo, they must be
explicitly closed in the OpenRepo.close() method to prevent resource
leaks.

Release-Notes: skip
Forward-Compatible: checked
Change-Id: I3485db2d62fcb944333d5deb3227d9f62294e413

java/com/google/gerrit/server/notedb/OpenRepo.java

diff --git a/java/com/google/gerrit/server/notedb/OpenRepo.java b/java/com/google/gerrit/server/notedb/OpenRepo.java
index c5aec40..18d7c2b 100644
--- a/java/com/google/gerrit/server/notedb/OpenRepo.java
+++ b/java/com/google/gerrit/server/notedb/OpenRepo.java
@@ -66,6 +66,7 @@
       return new OpenRepo(repo, rw, ins, new ChainedReceiveCommands(repo), true) {
         @Override
         public void close() {
+          cmds.close();
           reader.close();
           super.close();
         }