Store Change-Id in notedb

This adds a 'Change-id' footer to the commit message of the
refs/changes/XX/YYYY/meta notes branch when the change is created.

Tests which manually insert new changes must be adapted so that the
initial commit to the notes branch contains the Change-Id info.

Change-Id: I4a8fde3da5458afab69b39230a6db117fbef8ab9
Signed-off-by: Edwin Kempin <ekempin@google.com>

gerrit-server/src/main/java/com/google/gerrit/server/change/ChangeInserter.java

@@ -296,6 +296,7 @@ public class ChangeInserter extends BatchUpdate.InsertChangeOp {
     ctx.getChange().setCurrentPatchSet(patchSetInfo);
 
     ChangeUpdate update = ctx.getUpdate(psId);
+    update.setChangeId(change.getKey().get());
     update.setSubjectForCommit("Create change");
     update.setBranch(change.getDest().get());
     update.setTopic(change.getTopic());