update productmilestones tests to cover more of the api
update productmilestones tests to cover more of the api

thauser/pnc-cli,janinko/pnc-cli,janinko/pnc-cli,project-ncl/pnc-cli,project-ncl/pnc-cli,thauser/pnc-cli,thauser/pnc-cli,janinko/pnc-cli,project-ncl/pnc-cli