Moved user data provider implementations into a userdata package.
Refactored junit RelationshipTests to spock RelationshipSpec
Stopped using a deprecated method
Removing assumption that user data has unix "export" keyword.
ASGARD-1309 Platform-independent user data format

Similar to a properties file.
Merge pull request #578 from joesondow/ASGARD-1309-platform-independent-udf-format

ASGARD-1309 Platform-independent UDF format