Refactor Rebase to use PatchSetInserter

Refactor the rebase to use the PatchSetInserter class.

The PatchSetInserter takes care of sending email notifications about
new patch sets, so remove the rebase-specific sender.

Change-Id: I1e05db299d03d6b4a9eec4ae5bca4cd62cf01a4f

gerrit-server/src/main/resources/com/google/gerrit/server/mail/RebasedPatchSet.vm

@@ -1,54 +0,0 @@
-## Copyright (C) 2012 The Android Open Source Project
-##
-## Licensed under the Apache License, Version 2.0 (the "License");
-## you may not use this file except in compliance with the License.
-## You may obtain a copy of the License at
-##
-## http://www.apache.org/licenses/LICENSE-2.0
-##
-## Unless required by applicable law or agreed to in writing, software
-## distributed under the License is distributed on an "AS IS" BASIS,
-## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-## See the License for the specific language governing permissions and
-## limitations under the License.
-##
-##
-## Template Type:
-## -------------
-## This is a velocity mail template, see: http://velocity.apache.org and the
-## gerrit-docs:config-mail.txt for more info on modifying gerrit mail templates.
-##
-## Template File Names and extensions:
-## ----------------------------------
-## Gerrit will use templates ending in ".vm" but will ignore templates ending
-## in ".vm.example".  If a .vm template does not exist, the default internal
-## gerrit template which is the same as the .vm.example will be used.  If you
-## want to override the default template, copy the .vm.example file to a .vm
-## file and edit it appropriately.
-##
-## This Template:
-## --------------
-## The RebasedPatchSet.vm template will determine the contents of the email
-## related to a user rebasing a patchset for a change through the Gerrit UI.
-## It is a ChangeEmail: see ChangeSubject.vm and ChangeFooter.vm.
-##
-#if($email.reviewerNames)
-Hello $email.joinStrings($email.reviewerNames, ', '),
-
-I'd like you to reexamine a rebased change.#if($email.changeUrl)  Please visit
-
-    $email.changeUrl
-
-to look at the new rebased patch set (#$patchSet.patchSetId).
-#end
-#else
-$fromName has created a new patch set by issuing a rebase in Gerrit (#$patchSet.patchSetId).
-#end
-
-Change subject: $change.subject
-......................................................................
-
-$email.changeDetail
-#if($email.sshHost)
-  git pull ssh://$email.sshHost/$projectName $patchSet.refName
-#end