Refactor the model accesors

Refactor the accesors to behave like methods instead of properties.
This means all accesors will be prepended with the string
"get_" and will include a set of parenthesis.

Improve the ModeAttribute class to use the method's
short_description. This commit also adds support for a
new method .help_text attribute has been added.

Move accessors to their own module, named "methods.py".

Remove the PropertyHelper class as the accessors no longer
need it.

Signed-off-by: Roberto Rosario <Roberto.Rosario@mayan-edms.com>

mayan/apps/document_states/classes.py

@@ -7,22 +7,10 @@ from django.apps import apps
 from django.utils import six
 from django.utils.encoding import force_text
 
-from mayan.apps.common.classes import PropertyHelper
-
 __all__ = ('WorkflowAction',)
 logger = logging.getLogger(__name__)
 
 
-class DocumentStateHelper(PropertyHelper):
-    @staticmethod
-    @property
-    def constructor(*args, **kwargs):
-        return DocumentStateHelper(*args, **kwargs)
-
-    def get_result(self, name):
-        return self.instance.workflows.get(workflow__internal_name=name)
-
-
 class WorkflowActionMetaclass(type):
     _registry = {}