Fix iopsLimit parameter in ScaleIO connector

The parameter 'iops_limit' in the ScaleIO connector
is wrong. The correct parameter should be 'iopsLimit'.
Because of this error, the iops of the volume will stay
unlimited even if the user sets a limit on the iops.
This patch fixes this error.

Change-Id: I6b9212e9046bf3e2c9bbbde6354c298b359de3a6
Closes-Bug: #1521396

os_brick/initiator/connector.py

@@ -2311,7 +2311,7 @@ class ScaleIOConnector(InitiatorConnector):
             if self.bandwidth_limit is not None:
                 params['bandwidthLimitInKbps'] = self.bandwidth_limit
             if self.iops_limit is not None:
-                params['iops_limit'] = self.iops_limit
+                params['iopsLimit'] = self.iops_limit
 
             request = (
                 "https://%(server_ip)s:%(server_port)s/api/instances/"

os_brick/tests/initiator/test_connector.py

@@ -2143,6 +2143,18 @@ class ScaleIOConnectorTestCase(ConnectorTestCase):
         """Fake REST server"""
         api_call = url.split(':', 2)[2].split('/', 1)[1].replace('api/', '')
 
+        if 'setMappedSdcLimits' in api_call:
+            self.assertNotIn("iops_limit", kwargs['data'])
+            if "iopsLimit" not in kwargs['data']:
+                self.assertIn("bandwidthLimitInKbps",
+                              kwargs['data'])
+            elif "bandwidthLimitInKbps" not in kwargs['data']:
+                self.assertIn("iopsLimit", kwargs['data'])
+            else:
+                self.assertIn("bandwidthLimitInKbps",
+                              kwargs['data'])
+                self.assertIn("iopsLimit", kwargs['data'])
+
         try:
             return self.mock_calls[api_call]
         except KeyError: