Nimble: Enable thin provisioning as default

Since the value of flag ``thin_provisioning_support`` is not set;
during create volume, by default thick volumes are created.

This patch changes default behaviour to create thin volumes;
which is in line with Nimble CLI behaviour.

Change-Id: I8845ed4ba029f6e3b7a3f0f99d438ce7228e4c42

cinder/tests/unit/volume/drivers/hpe/test_nimble.py

@@ -1138,6 +1138,7 @@ class NimbleDriverVolumeTestCase(NimbleDriverBaseTestCase):
                                    'reserved_percentage': 0,
                                    'QoS_support': False,
                                    'multiattach': True,
+                                   'thin_provisioning_support': True,
                                    'consistent_group_snapshot_enabled': True}]}
         self.assertEqual(
             expected_res,

cinder/volume/drivers/hpe/nimble.py

@@ -403,6 +403,7 @@ class NimbleBaseVolumeDriver(san.SanDriver):
                 reserved_percentage=0,
                 QoS_support=False,
                 multiattach=True,
+                thin_provisioning_support=True,
                 consistent_group_snapshot_enabled=True)
             self.group_stats['pools'] = [single_pool]
         return self.group_stats

releasenotes/notes/nimble-thin-provision-by-default-c5ac66120b2361ef.yaml

@@ -0,0 +1,5 @@
+---
+other:
+  - |
+    Nimble driver: Enable thin provisioning as default method while creating
+    volumes.