Provide getter for test results properties in `arc diff`
Provide getter for test results properties in `arc diff`

Summary: We want to use them in event.

Test Plan: Will use it in event.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3690

phacility/arcanist,Khan/arcanist,r4nt/arcanist,wikimedia/phabricator-arcanist,fivestars/arcanist,wharris/arcanist,chundongwang/arcanist,zhihu/arcanist,Khan/arcanist,alexmv/arcanist,dguo-coursera/arcanist,alexmv/arcanist,memsql/arcanist,KieranHayes/arcanist,kevinseelbach/arcanist,phacility/arcanist,aik099/arcanist,kevinseelbach/arcanist,julkiewicz/arcanist,codelabs-ch/arcanist,coursera/arcanist,wikimedia/phabricator-arcanist,KieranHayes/arcanist,eSpark/arcanist,eSpark/arcanist,Symplicity/arcanist,Khan/arcanist,KieranHayes/arcanist,PageUpPeopleOrg/arcanist-patches,hach-que/arcanist,r4nt/arcanist,julkiewicz/arcanist,hach-que/arcanist,calblueprint/arcanist,jra3/arcanist,aik099/arcanist,aik099/arcanist,folsom-labs/arcanist,PageUpPeopleOrg/arcanist-patches,julkiewicz/arcanist,julkiewicz/arcanist,hach-que/arcanist,jra3/arcanist,jra3/arcanist,fivestars/arcanist,kevinseelbach/arcanist,memsql/arcanist,chundongwang/arcanist,wikimedia/phabricator-arcanist,sneakpeeq/arcanist,folsom-labs/arcanist,codelabs-ch/arcanist,uber/arcanist,coursera/arcanist,eSpark/arcanist,PageUpPeopleOrg/arcanist-patches,phacility/arcanist,wxstars/arcanist,r4nt/arcanist,zhihu/arcanist,calblueprint/arcanist,Khan/arcanist,memsql/arcanist,aik099/arcanist,eSpark/arcanist,haskell-infra/arcanist,KieranHayes/arcanist,haskell-infra/arcanist,zhihu/arcanist,dguo-coursera/arcanist,haskell-infra/arcanist,wharris/arcanist,dguo-coursera/arcanist,calblueprint/arcanist,fivestars/arcanist,sneakpeeq/arcanist,wharris/arcanist,sneakpeeq/arcanist,wxstars/arcanist,alexmv/arcanist,fivestars/arcanist,wikimedia/phabricator-arcanist,phacility/arcanist,jra3/arcanist,chundongwang/arcanist,uber/arcanist,zhihu/arcanist,uber/arcanist,alexmv/arcanist,codelabs-ch/arcanist,phacility/arcanist,chundongwang/arcanist,haskell-infra/arcanist,codelabs-ch/arcanist,uber/arcanist,r4nt/arcanist,Symplicity/arcanist,dguo-coursera/arcanist,wxstars/arcanist,calblueprint/arcanist,Symplicity/arcanist,sneakpeeq/arcanist,kevinseelbach/arcanist,wharris/arcanist,coursera/arcanist,codelabs-ch/arcanist,wxstars/arcanist,PageUpPeopleOrg/arcanist-patches,coursera/arcanist,hach-que/arcanist,memsql/arcanist,folsom-labs/arcanist,folsom-labs/arcanist,Symplicity/arcanist