[Pki-devel] [PATCH] 99 Fixes for trac tickets 1040 and 1041 (Related to refactoring python modules)

Please review the attached patch with fixes for tickets 1040 and 1041. Changes made: -- Added dictionaries with mapping for python attribute names and JSON attribute names received from the server. -- Made changes to from_json methods in data classes to take care of missing attributes in the JSON string. (#1040 - caused due to missing attribute in the JSON value of the CertData object when tested by Endi). -- Renamed kraclient module to kra. (#1041). updated import in drmtest.py. -- Removed the usage of properties in the some classes. The reverse conversion of atribute names from _separated names to camelCase is done using the name mapping dictionaries in the classes and a static method added in CustomEncoder in the encoder module. -- Fixed some issues in drmtest.py. -- Updated the license string in the files. Note: The following changes are limited to cert and key modules. Similar changes will be made to profile module once it is completely checked in. Tested the code by running cert and drmtest modules. -- Abhishek