Make sure to always remove in-flight pushes

When a push is finished successfully or fails due to an error we have to
remove it from the map of in-flight pushes. Although this was done from
a finally block, the same block performed a Repository.close() operation
prior to the in-flight push removal. If the Repository.close() threw an
exception the pool.notifyFinished() wouldn't be called and we would end
up with a zombie in-flight push.

Bug: Issue 10852
Change-Id: I8d5918d5271ba74ce12153f054503adaef155c5c

src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java b/src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java
index 5c24c74..83bfda0 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java
@@ -388,10 +388,10 @@
     } catch (PermissionBackendException | RuntimeException | Error e) {
       stateLog.error("Unexpected error during replication to " + uri, e, getStatesAsArray());
     } finally {
+      pool.notifyFinished(this);
       if (git != null) {
         git.close();
       }
-      pool.notifyFinished(this);
     }
   }