Remove -a option for gppersistentrebuild.

This option is very misleading and needs to be removed.
We want to make sure that the user sees the double prompt that the
tool should only be used by Pivotal Support.

gpMgmt/sbin/gppersistentrebuild

@@ -83,7 +83,7 @@ def create_parser():
                        version='%prog version $Revision: #5 $',
                        description='Rebuild persistent tables')
 
-    addStandardLoggingAndHelpOptions(parser, includeNonInteractiveOption=True)
+    addStandardLoggingAndHelpOptions(parser, includeNonInteractiveOption=False)
 
     addTo = OptionGroup(parser, 'Persistent tables rebuild options')
     addTo.add_option('-f', '--contentid-file', metavar="<filename>",