Add new module azure_rm_datafacotry (#840)

* add new module azure_rm_datafacotry

* Fixed a sanity test failure

* update azure_rm_common.py

* fix dev sanity error

* Update azure_rm_datafactory_info.py

Update return key!

* Update azure_rm_datafactory_info.py

update azure_rm_datafactory_info return key!

* Update azure_rm_datafactory.py

Update azure_rm_datafactory.py return key!

plugins/module_utils/azure_rm_common.py

@@ -275,6 +275,8 @@ def default_api_version(self):
     import azure.mgmt.datalake.store.models as DataLakeStoreAccountModel
     from azure.mgmt.notificationhubs import NotificationHubsManagementClient
     from azure.mgmt.eventhub import EventHubManagementClient
+    from azure.mgmt.datafactory import DataFactoryManagementClient
+    import azure.mgmt.datafactory.models as DataFactoryModel
     from azure.identity._credentials import client_secret, user_password
 
 except ImportError as exc:
@@ -446,6 +448,7 @@ def __init__(self, derived_arg_spec, bypass_checks=False, no_log=False,
         self._recovery_services_backup_client = None
         self._search_client = None
         self._datalake_store_client = None
+        self._datafactory_client = None
         self._notification_hub_client = None
         self._event_hub_client = None
 
@@ -1381,6 +1384,19 @@ def event_hub_client(self):
                 api_version='2018-05-04')
         return self._event_hub_client
 
+    @property
+    def datafactory_client(self):
+        self.log('Getting datafactory client...')
+        if not self._datafactory_client:
+            self._datafactory_client = self.get_mgmt_svc_client(DataFactoryManagementClient,
+                                                                is_track2=True,
+                                                                base_url=self._cloud_environment.endpoints.resource_manager)
+        return self._datafactory_client
+
+    @property
+    def datafactory_model(self):
+        return DataFactoryModel
+
 
 class AzureSASAuthentication(Authentication):
     """Simple SAS Authentication.