slapos.package: config_dict is optional.

slapos/package/base_promise.py

@@ -54,7 +54,8 @@ class ExecError(SlapError):
 
 # Class containing all parameters needed for configuration
 class Config:
-  def __init__(self, option_dict):
+  def __init__(self, option_dict=None):
+    if option_dict is not None:
       # Set options parameters
       for option, value in option_dict.__dict__.items():
         setattr(self, option, value)
@@ -64,7 +65,7 @@ class BasePromise(PackageManager):
   systemctl_path_list = ["/bin/systemctl", 
                          "/usr/bin/systemctl"]
 
-  def __init__(self, config_dict):
+  def __init__(self, config_dict=None):
     self.config = Config(config_dict)
 
     self.logger = logging.getLogger('')