Fix tests for proposal validations
Use Process.fork so we can stub it
Add back export implementation

Add back export of the stored data, called by SupportController and
accidentally removed in ff7e15ae365a685d2f19a828d744524b7518db0c.
Add test for SupportController#export_chef
Merge pull request #948 from bkutil/fix/test_fix_for_proposal_validations

Fix tests for proposal validations
Merge pull request #952 from bkutil/fix/add_back_chef_export

Fix/add back chef export