Fix compatibility with Manilaclient and Horizon

Horizon has removed Saharaclient and Troveclient from its dependencies,
so, remove their code from Manila-UI too.
Latest release of Manilaclient v1.6.0 broke possibility to import
deprecated v1 API modules having b_u_g 1535692. So, change usage of
manilaclient in the way when we do not hit that bug.

Change-Id: I907502a6dcb9ff8521935428bbb34b930b134553
Closes-Bug: #1535657

manila_ui/dashboards/project/shares/test_data.py

@@ -13,11 +13,21 @@
 #    under the License.
 import collections
 
-from manilaclient.v1 import quotas
-from manilaclient.v1 import security_services
-from manilaclient.v1 import share_networks
-from manilaclient.v1 import share_snapshots
-from manilaclient.v1 import shares
+try:
+    # NOTE(vponomaryov): Try import latest modules, assuming we have
+    # manilaclient that is new enough and have v2 API support.
+    from manilaclient.v2 import quotas
+    from manilaclient.v2 import security_services
+    from manilaclient.v2 import share_networks
+    from manilaclient.v2 import share_snapshots
+    from manilaclient.v2 import shares
+except ImportError:
+    # NOTE(vponomaryov): If we got here then we have old manilaclient.
+    from manilaclient.v1 import quotas
+    from manilaclient.v1 import security_services
+    from manilaclient.v1 import share_networks
+    from manilaclient.v1 import share_snapshots
+    from manilaclient.v1 import shares
 
 from openstack_dashboard import api
 from openstack_dashboard.usage import quotas as usage_quotas

manila_ui/exceptions.py

@@ -24,9 +24,7 @@ from manilaclient import exceptions as manilaclient
 from neutronclient.common import exceptions as neutronclient
 from novaclient import exceptions as novaclient
 from requests import exceptions as requests
-from saharaclient.api import base as saharaclient
 from swiftclient import client as swiftclient
-from troveclient import exceptions as troveclient
 
 
 UNAUTHORIZED = (
@@ -37,7 +35,6 @@ UNAUTHORIZED = (
     manilaclient.Unauthorized,
     neutronclient.Unauthorized,
     heatclient.HTTPUnauthorized,
-    troveclient.Unauthorized,
 )
 
 
@@ -49,7 +46,6 @@ NOT_FOUND = (
     manilaclient.NotFound,
     neutronclient.NotFound,
     heatclient.HTTPNotFound,
-    troveclient.NotFound,
 )
 
 
@@ -71,7 +67,5 @@ RECOVERABLE = (
     swiftclient.ClientException,
     heatclient.HTTPForbidden,
     heatclient.HTTPException,
-    troveclient.ClientException,
-    saharaclient.APIException,
     requests.RequestException,
 )