Add Wrapperclass for Parser to RedPage

Add a wrapper class to overwrite type of Items returned by
RedPage.redfams relationship

Related Task: [https://fs.golderweb.de/index.php?do=details&task_id=109 FS#109]

lib/redpage.py

@@ -30,7 +30,8 @@ import mwparserfromhell as mwparser
 
 import jogobot  # noqa
 
-from lib.mysqlred import MysqlRedPage
+from lib.mysqlred import (
+    MysqlRedPage, relationship, attribute_mapped_collection )
 from lib.redfam import RedFamParser
 
 
@@ -131,3 +132,12 @@ class RedPage( MysqlRedPage ):
         Calls flush method of Mysql Interface class
         """
         cls.session.commit()
+
+
+class RedPageParser( RedPage ):
+    """
+    Wrapper class to change the type of redfams collection elements in parser
+    """
+    redfams = relationship(
+        "RedFamParser", enable_typechecks=False, back_populates="redpage",
+        collection_class=attribute_mapped_collection("famhash") )