Allow to propose changes to access rights through code review

Users that are able to upload changes for code review for the
refs/meta/config branch can now propose changes to the project access
rights through code review directly from the ProjectAccessScreen.

When editing the project access rights there will be a new button
'Save for Review' which will create a new change for the access
rights modifications. Project owners are automatically added as
reviewer to this change. If a project owner agrees to the access rights
modifications he can simply approve and submit the change.

Change-Id: Ica40ce3f57726bdb897e01783cc6da10f1d392cc
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com>
Signed-off-by: Gustaf Lundh <gustaf.lundh@sonymobile.com>
Signed-off-by: Ulrik Sjölin <ulrik.sjolin@sonyericsson.com>

gerrit-sshd/src/main/java/com/google/gerrit/sshd/commands/AdminSetParent.java

@@ -137,9 +137,7 @@ final class AdminSetParent extends SshCommand {
           config.getProject().setParentName(newParentKey);
           md.setMessage("Inherit access from "
               + (newParentKey != null ? newParentKey.get() : allProjectsName.get()) + "\n");
-          if (!config.commit(md)) {
-            err.append("error: Could not update project " + name + "\n");
-          }
+          config.commit(md);
         } finally {
           md.close();
         }