Added option --advance-by to allow advancing of lease start date

Added option --advance-by to the mutually exclusive group containing
--defer-by to allow the user to advance the start date of a lease.

Change-Id: I4cb801e29407917f3d409a7866bd53ec2184e93d
Closes-Bug: 1314791

climateclient/v1/leases.py

@@ -36,14 +36,14 @@ class LeaseClientManager(base.BaseClientManager):
         return self._get('/leases/%s' % lease_id, 'lease')
 
     def update(self, lease_id, name=None, prolong_for=None, reduce_by=None,
-               defer_by=None):
+               advance_by=None, defer_by=None):
         """Update attributes of the lease."""
         values = {}
         if name:
             values['name'] = name
 
         lease_end_date_change = prolong_for or reduce_by
-        lease_start_date_change = defer_by
+        lease_start_date_change = defer_by or advance_by
         lease = None
 
         if lease_end_date_change:
@@ -57,7 +57,7 @@ class LeaseClientManager(base.BaseClientManager):
                 lease = self.get(lease_id)
             self._add_lease_date(values, lease, 'start_date',
                                  lease_start_date_change,
-                                 True)
+                                 defer_by is not None)
 
         if not values:
             return _('No values to update passed.')

climateclient/v1/shell_commands/leases.py

@@ -258,6 +258,11 @@ class UpdateLease(command.UpdateCommand):
             help='Time to defer the lease start',
             default=None
         )
+        group.add_argument(
+            '--advance-by',
+            help='Time to advance the lease start',
+            default=None
+        )
 
         return parser
 
@@ -271,6 +276,8 @@ class UpdateLease(command.UpdateCommand):
             params['reduce_by'] = parsed_args.reduce_by
         if parsed_args.defer_by:
             params['defer_by'] = parsed_args.defer_by
+        if parsed_args.advance_by:
+            params['advance_by'] = parsed_args.advance_by
         return params