Support pagination param limit in volume list in V1

Since v1 api supports limit param in volume list, cinderclient
should support it too.

Change-Id: I60ffe0190a61dee354de5bc60ea3210c666bf6f2
Closes-Bug: #1447162

cinderclient/tests/unit/v1/test_shell.py

@@ -220,6 +220,10 @@ class ShellTest(utils.TestCase):
         self.run_command('availability-zone-list')
         self.assert_called('GET', '/os-availability-zone')
 
+    def test_list_limit(self):
+        self.run_command('list --limit=10')
+        self.assert_called('GET', '/volumes/detail?limit=10')
+
     def test_show(self):
         self.run_command('show 1234')
         self.assert_called('GET', '/volumes/1234')

cinderclient/v1/shell.py

@@ -170,6 +170,11 @@ def _extract_metadata(args):
     nargs='?',
     metavar='<tenant>',
     help='Display information from single tenant (Admin only).')
+@utils.arg(
+    '--limit',
+    metavar='<limit>',
+    default=None,
+    help='Maximum number of volumes to return. OPTIONAL: Default=None.')
 @utils.service_type('volume')
 def do_list(cs, args):
     """Lists all volumes."""
@@ -182,7 +187,7 @@ def do_list(cs, args):
         'status': args.status,
         'metadata': _extract_metadata(args) if args.metadata else None,
     }
-    volumes = cs.volumes.list(search_opts=search_opts)
+    volumes = cs.volumes.list(search_opts=search_opts, limit=args.limit)
     _translate_volume_keys(volumes)
 
     # Create a list of servers to which the volume is attached

cinderclient/v1/volumes.py

@@ -190,7 +190,7 @@ class VolumeManager(base.ManagerWithFind):
         """
         return self._get("/volumes/%s" % volume_id, "volume")
 
-    def list(self, detailed=True, search_opts=None):
+    def list(self, detailed=True, search_opts=None, limit=None):
         """
         Get a list of all volumes.
 
@@ -205,6 +205,9 @@ class VolumeManager(base.ManagerWithFind):
             if val:
                 qparams[opt] = val
 
+        if limit:
+            qparams['limit'] = limit
+
         # Transform the dict to a sequence of two-element tuples in fixed
         # order, then the encoded string will be consistent in Python 2&3.
         if qparams: