Fix initial change upload over SSH by ensuring sortKey is set

We have to call ChangeUtil.update() prior to inserting a change
into the data store, otherwise the required changeKey field isn't
populated and it won't be visible in search queries.

Signed-off-by: Shawn O. Pearce <sop@google.com>

appjar/src/main/java/com/google/gerrit/server/ssh/Receive.java

@@ -472,6 +472,7 @@ class Receive extends AbstractGitCommand {
     imp.setTransaction(txn);
     imp.run();
     change.setCurrentPatchSet(imp.getPatchSetInfo());
+    ChangeUtil.updated(change);
     db.changes().insert(Collections.singleton(change));
 
     for (final ApprovalType t : Common.getGerritConfig().getApprovalTypes()) {