Add cloud-init datasources

Author: Cristi1324

coriolis/osmorphing/base.py

@@ -136,6 +136,10 @@ def __init__(self, conn, os_root_dir, os_root_dev, hypervisor,
             detected_os_info, osmorphing_parameters, operation_timeout)
         self._ssh = conn
 
+    @property
+    def datasource_list(self):
+        return []
+
     @classmethod
     def get_required_detected_os_info_fields(cls):
         return REQUIRED_DETECTED_OS_FIELDS
@@ -456,7 +460,7 @@ def _configure_cloud_init(self):
             cloud_cfg_user_retention = {
                 'disable_root': False,
                 'ssh_pwauth': True,
-                'users': None
+                'users': []
             }
             cloud_cfg_mods.update(cloud_cfg_user_retention)
         else:
@@ -466,6 +470,12 @@ def _configure_cloud_init(self):
             disabled_network_config = {"network": {"config": "disabled"}}
             cloud_cfg_mods.update(disabled_network_config)
 
+        if self.datasource_list:
+            datasource_cfg = {'datasource_list': self.datasource_list}
+            cloud_cfg_mods.update(datasource_cfg)
+        else:
+            LOG.warning("No datasource_list passed to cloud-init")
+
         self._write_cloud_init_mods_config(cloud_cfg_mods)
 
     def _test_path_chroot(self, path):