when syncing repo, only request selective testing if a project is an autobazel project
when syncing repo, only request selective testing if a project is an autobazel project

Reviewers: anupc

Reviewed By: anupc

Subscribers: anupc, kylec, wwu

Differential Revision: https://tails.corp.dropbox.com/D234145

dropbox/changes,dropbox/changes,dropbox/changes,dropbox/changes