Fixes #4013 - Remove all comma after promisers and 'owners' attribute from 'copy_from' body
Refs #4013 - Modify CFEngine standard library from initial promises to be CFEngine 3.5 compliant
Merge pull request #207 from nperron/ust_3869/dev/4013_remove_comma_and_obsolete_attribute_from_init_promises

Fixes #4013 - Remove all comma after promisers and 'owners' attribute from 'copy_from' body