Remove duplicate keys from dictionary

There are a few places where duplicate keys are defined in the
dictionary. Removed all such occurrences throughout the code.

TrivialFix

Change-Id: I3f22a2ce3bc4d67bfaed2dee7918610b3225e26e

manila/tests/scheduler/test_host_manager.py

@@ -603,7 +603,6 @@ class HostStateTestCase(test.TestCase):
                  'reserved_percentage': 0,
                  'dying_disks': 200,
                  'super_hero_1': 'superman',
-                 'super_hero_2': ' ',
                  'super_hero_2': 'Hulk',
                  }
             ],

manila/tests/share/drivers/huawei/test_huawei_nas.py

@@ -458,7 +458,6 @@ class HuaweiShareDriverTestCase(test.TestCase):
             'share_proto': 'NFS',
             'share_network_id': 'fake_net_id',
             'share_server_id': 'fake-share-srv-id',
-            'host': 'fake_host@fake_backend#OpenStack_Pool',
             'export_locations': [
                 {'path': '100.115.10.68:/share_fake_uuid'},
             ],

manila_tempest_tests/tests/api/admin/test_share_networks.py

@@ -53,8 +53,6 @@ class ShareNetworkAdminTest(
             type_of_creds='alt')
         cls.data_sn_with_kerberos_ss = {
             'name': 'sn_with_kerberos_ss',
-            'neutron_net_id': '3333',
-            'neutron_subnet_id': '4444',
             'created_at': '2003-03-03',
             'updated_at': None,
             'neutron_net_id': 'test net id',

manila_tempest_tests/tests/api/test_share_networks.py

@@ -117,8 +117,6 @@ class ShareNetworksTest(base.BaseSharesTest, ShareNetworkListMixin):
 
         cls.data_sn_with_kerberos_ss = {
             'name': 'sn_with_kerberos_ss',
-            'neutron_net_id': '3333',
-            'neutron_subnet_id': '4444',
             'created_at': '2003-03-03',
             'updated_at': None,
             'neutron_net_id': 'test net id',