Updated the help text for nova list command.

Few options in the nova list command are admin specific. Updated the help text
to specify the admin only options explitcitly.

Fixes LP: #1055983

Change-Id: Icf8a76e79b9d5399298dacce31b1cc0873f63d71

novaclient/v1_1/shell.py

@@ -617,12 +617,12 @@ def do_image_delete(cs, args):
     dest='ip',
     metavar='<ip-regexp>',
     default=None,
-    help='Search with regular expression match by IP address')
+    help='Search with regular expression match by IP address (Admin only).')
 @utils.arg('--ip6',
     dest='ip6',
     metavar='<ip6-regexp>',
     default=None,
-    help='Search with regular expression match by IPv6 address')
+    help='Search with regular expression match by IPv6 address (Admin only).')
 @utils.arg('--name',
     dest='name',
     metavar='<name-regexp>',
@@ -632,7 +632,7 @@ def do_image_delete(cs, args):
     dest='instance_name',
     metavar='<name-regexp>',
     default=None,
-    help='Search with regular expression match by instance name')
+    help='Search with regular expression match by instance name (Admin only).')
 @utils.arg('--instance_name',
     help=argparse.SUPPRESS)
 @utils.arg('--status',
@@ -655,7 +655,8 @@ def do_image_delete(cs, args):
     dest='host',
     metavar='<hostname>',
     default=None,
-    help='Search instances by hostname to which they are assigned')
+    help='Search instances by hostname to which they are assigned '
+         '(Admin only).')
 @utils.arg('--all-tenants',
     dest='all_tenants',
     metavar='<0|1>',