Region adjustment

STACKIT will move to a new way of specifying regions, where the region is provided
as a function argument instead of being set in the client configuration.
Once all services have migrated, the methods to specify the region in the client
configuration will be removed.

Signed-off-by: Alexander Dahmen <alexander.dahmen@inovex.de>

Author: Fyusel

templates/python/configuration.mustache

@@ -8,6 +8,8 @@ class HostConfiguration:
                  server_operation_index=None, server_operation_variables=None,
                  ignore_operation_servers=False,
                  ) -> None:
+        print('''WARNING: STACKIT will move to a new way of specifying regions, where the region is provided as a function argument instead of being set in the client configuration.
+        Once all services have migrated, the methods to specify the region in the client configuration will be removed.''')
         """Constructor
         """
         self._base_path = "{{{basePath}}}"
@@ -67,6 +69,7 @@ class HostConfiguration:
         :param index: array index of the host settings
         :param variables: hash of variable and the corresponding value
         :param servers: an array of host settings or None
+        :error: if a region is given for a global url
         :return: URL based on host settings
         """
         if index is None:
@@ -86,6 +89,12 @@ class HostConfiguration:
 
         # go through variables and replace placeholders
         for variable_name, variable in server.get('variables', {}).items():
+            # If a region is provided by the user return an error.
+            # The region is provided as a function argument instead of being set in the client configuration.
+            if variable_name == 'region' and variables.get(variable_name) is not None:
+                raise ValueError(
+                    "this API does not support setting a region in the the client configuration, please check if the region can be specified as a function parameter"
+                )
             used_value = variables.get(
                 variable_name, variable['default_value'])