Use dummy index module in RebuildNotedb program

RebuildNotedb doesn't need the secondary index.  Install the
dummy index module instead of Lucene or Solr.

This will slightly reduce the work needed to add a new secondary
index type as we no longer need to also add it here.

Change-Id: Ia9222ef0ea13d2a881dcbc31bf56b4def1fd7603
Factor 'submittable' logic out of the Labels class

The logic to determine a change's submittability does not belong
in the Labels class.

Move it into ChangeScreen2.

Change-Id: I49ece9b1e3e0858727b254241ffb6a0f98bda127
Message.ui.xml: Use lowercase for visibility field

A future version of the GWT GSS parser will treat uppercase tokens as
variable names rather than literals.

Change-Id: I8c3f08031b7dd2a04058b7e1502d0f20d56bf0b7
InlineEdit: Report same commit message error to client

Change-Id: Iabacdf49351f0430629b7ab4de53a2c1e7b9f9c8
Add missing documentation of gerrit.secureStoreClass setting

Change-Id: Ie33f1c7193b132c8cc21c9e925bcd7e19b121bbf
Tidy up documentation of --create-new-change-for-all-not-in-target

Change-Id: I12449837c86f547a0604f43a7322a2f515aae4df