Add a new option '--redirect-http-code' into L7Policy CLI

This patch add a new option '--redirect-http-code' into L7Policy for
redirection url and prefix action.

Change-Id: I30b1a7555e1d910e07379bc69e739225a35a1a0c
Story: 2003609
Depends-On: https://review.openstack.org/#/c/625007

octaviaclient/osc/v2/constants.py

@@ -159,7 +159,8 @@ L7POLICY_ROWS = (
     'position',
     'id',
     'operating_status',
-    'name')
+    'name',
+    'redirect_http_code')
 
 L7POLICY_COLUMNS = (
     'id',

octaviaclient/osc/v2/l7policy.py

@@ -24,6 +24,7 @@ from octaviaclient.osc.v2 import validate
 
 ACTION_CHOICES = ['REDIRECT_TO_URL', 'REDIRECT_TO_POOL',
                   'REDIRECT_PREFIX', 'REJECT']
+REDIRECT_CODE_CHOICES = [301, 302, 303, 307, 308]
 
 
 class CreateL7Policy(command.ShowOne):
@@ -74,6 +75,14 @@ class CreateL7Policy(command.ShowOne):
             help="Set the URL Prefix to redirect requests to."
         )
 
+        parser.add_argument(
+            '--redirect-http-code',
+            metavar='<redirect_http_code>',
+            choices=REDIRECT_CODE_CHOICES,
+            type=int,
+            help="Set the HTTP response code for REDIRECT_URL or"
+                 "REDIRECT_PREFIX action."
+        )
         parser.add_argument(
             '--position',
             metavar='<position>',
@@ -231,6 +240,14 @@ class SetL7Policy(command.Command):
             metavar='<url>',
             help="Set the URL Prefix to redirect requests to."
         )
+        parser.add_argument(
+            '--redirect-http-code',
+            metavar='<redirect_http_code>',
+            choices=REDIRECT_CODE_CHOICES,
+            type=int,
+            help="Set the HTTP response code for REDIRECT_URL or"
+                 "REDIRECT_PREFIX action."
+        )
         parser.add_argument(
             '--position',
             metavar='<position>',

octaviaclient/osc/v2/utils.py

@@ -316,6 +316,7 @@ def get_l7policy_attrs(client_manager, parsed_args):
         'name': ('name', str),
         'description': ('description', str),
         'redirect_url': ('redirect_url', str),
+        'redirect_http_code': ('redirect_http_code', int),
         'redirect_prefix': ('redirect_prefix', str),
         'l7policy': (
             'l7policy_id',