[hack] Fix hh_server not restarting on .hhconfig change
[hack] Fix hh_server not restarting on .hhconfig change

Summary: Regression was introduced in {D2527698}. But now we have a working
test framework! So we can write tests!

Reviewed By: @dlreeves

Differential Revision: D2543031

fb-gh-sync-id: f0a72d0bc77e28b7564c76ed79090003dd6205e8

jgrund/flow,samwgoldman/flow,AprilArcus/flow,mroch/flow,claudiopro/flow,fletcherw/flow,jdelStrother/flow,d14b3l/flow,jdelStrother/flow,samwgoldman/flow,OCamlPro/flow,facebook/flow,ForbesLindesay/flow,claudiopro/flow,ForbesLindesay/flow,ForbesLindesay/flow,graue/flow,d14b3l/flow,mroch/flow,JonathanUsername/flow,nmote/flow,chenglou/flow,facebook/flow,jamesgpearce/flow,samwgoldman/flow,cesarandreu/flow,gabelevi/flow,popham/flow,facebook/flow,samwgoldman/flow,d14b3l/flow,shiftcars/flow,graue/flow,Eyyub/flow,TiddoLangerak/flow,fletcherw/flow,nmote/flow,ylu1317/flow,Eyyub/flow,jdelStrother/flow,Eyyub/flow,OCamlPro/flow,TiddoLangerak/flow,jdelStrother/flow,gabro/flow,jamesgpearce/flow,claudiopro/flow,jgrund/flow,jgrund/flow,facebook/flow,AprilArcus/flow,ForbesLindesay/flow,jgrund/flow,popham/flow,nmote/flow,OCamlPro/flow,nmote/flow,TiddoLangerak/flow,jeffmo/flow,gabelevi/flow,AprilArcus/flow,JonathanUsername/flow,chenglou/flow,samwgoldman/flow,fletcherw/flow,MichaelDeBoey/flow,JonathanUsername/flow,facebook/flow,nmote/flow,claudiopro/flow,chenglou/flow,jamesgpearce/flow,gabro/flow,shiftcars/flow,JonathanUsername/flow,jamesgpearce/flow,chenglou/flow,samwgoldman/flow,mroch/flow,mroch/flow,AgentME/flow,cesarandreu/flow,gabelevi/flow,claudiopro/flow,gabro/flow,popham/flow,d14b3l/flow,AprilArcus/flow,graue/flow,ylu1317/flow,popham/flow,fletcherw/flow,AgentME/flow,JonathanUsername/flow,JonathanUsername/flow,AgentME/flow,gabelevi/flow,chenglou/flow,shiftcars/flow,ylu1317/flow,jdelStrother/flow,d14b3l/flow,graue/flow,gabelevi/flow,ForbesLindesay/flow,jgrund/flow,AprilArcus/flow,Eyyub/flow,nmote/flow,mroch/flow,ylu1317/flow,d14b3l/flow,AgentME/flow,MichaelDeBoey/flow,jdelStrother/flow,facebook/flow,AgentME/flow,jamesgpearce/flow,jamesgpearce/flow,ForbesLindesay/flow,gabro/flow,fletcherw/flow,ylu1317/flow,jamesgpearce/flow,AprilArcus/flow,chenglou/flow,popham/flow,jeffmo/flow,OCamlPro/flow,popham/flow,jgrund/flow,MichaelDeBoey/flow,facebook/flow,MichaelDeBoey/flow,jeffmo/flow,shiftcars/flow,gabelevi/flow,TiddoLangerak/flow,mroch/flow,gabro/flow,jeffmo/flow,cesarandreu/flow,graue/flow,shiftcars/flow,shiftcars/flow,TiddoLangerak/flow,MichaelDeBoey/flow,cesarandreu/flow,jeffmo/flow,samwgoldman/flow,gabelevi/flow,graue/flow,fletcherw/flow,mroch/flow,JonathanUsername/flow,jeffmo/flow,gabro/flow,popham/flow,nmote/flow