fixing appveyor.yml
fixing appveyor.yml

Summary: Single quotes are dangerous in cmd.exe - removing unnecessary quoting of arguments which caused empty test selectors

Test Plan: https://ci.appveyor.com/project/ilya-klyuchnikov/buck/build/2

Reviewed By: styurin

fbshipit-source-id: c773a08

brettwooldridge/buck,shs96c/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,shs96c/buck,clonetwin26/buck,brettwooldridge/buck,SeleniumHQ/buck,brettwooldridge/buck,JoelMarcey/buck,LegNeato/buck,SeleniumHQ/buck,ilya-klyuchnikov/buck,shs96c/buck,JoelMarcey/buck,clonetwin26/buck,Addepar/buck,facebook/buck,ilya-klyuchnikov/buck,JoelMarcey/buck,rmaz/buck,JoelMarcey/buck,clonetwin26/buck,brettwooldridge/buck,facebook/buck,rmaz/buck,facebook/buck,SeleniumHQ/buck,Addepar/buck,brettwooldridge/buck,clonetwin26/buck,ilya-klyuchnikov/buck,JoelMarcey/buck,Addepar/buck,SeleniumHQ/buck,LegNeato/buck,kageiit/buck,brettwooldridge/buck,brettwooldridge/buck,ilya-klyuchnikov/buck,SeleniumHQ/buck,rmaz/buck,facebook/buck,romanoid/buck,facebook/buck,zpao/buck,brettwooldridge/buck,shs96c/buck,LegNeato/buck,JoelMarcey/buck,clonetwin26/buck,LegNeato/buck,clonetwin26/buck,romanoid/buck,LegNeato/buck,shs96c/buck,ilya-klyuchnikov/buck,SeleniumHQ/buck,romanoid/buck,JoelMarcey/buck,SeleniumHQ/buck,Addepar/buck,rmaz/buck,shs96c/buck,rmaz/buck,romanoid/buck,ilya-klyuchnikov/buck,romanoid/buck,nguyentruongtho/buck,rmaz/buck,clonetwin26/buck,rmaz/buck,kageiit/buck,romanoid/buck,Addepar/buck,shs96c/buck,nguyentruongtho/buck,shs96c/buck,rmaz/buck,ilya-klyuchnikov/buck,shs96c/buck,kageiit/buck,JoelMarcey/buck,clonetwin26/buck,kageiit/buck,SeleniumHQ/buck,rmaz/buck,romanoid/buck,shs96c/buck,romanoid/buck,facebook/buck,ilya-klyuchnikov/buck,romanoid/buck,kageiit/buck,romanoid/buck,SeleniumHQ/buck,ilya-klyuchnikov/buck,zpao/buck,nguyentruongtho/buck,facebook/buck,brettwooldridge/buck,SeleniumHQ/buck,LegNeato/buck,romanoid/buck,clonetwin26/buck,Addepar/buck,JoelMarcey/buck,brettwooldridge/buck,LegNeato/buck,zpao/buck,Addepar/buck,nguyentruongtho/buck,LegNeato/buck,LegNeato/buck,clonetwin26/buck,ilya-klyuchnikov/buck,rmaz/buck,LegNeato/buck,zpao/buck,zpao/buck,clonetwin26/buck,nguyentruongtho/buck,romanoid/buck,LegNeato/buck,rmaz/buck,nguyentruongtho/buck,kageiit/buck,brettwooldridge/buck,nguyentruongtho/buck,clonetwin26/buck,clonetwin26/buck,ilya-klyuchnikov/buck,SeleniumHQ/buck,ilya-klyuchnikov/buck,shs96c/buck,ilya-klyuchnikov/buck,Addepar/buck,rmaz/buck,LegNeato/buck,Addepar/buck,SeleniumHQ/buck,shs96c/buck,brettwooldridge/buck,JoelMarcey/buck,Addepar/buck,brettwooldridge/buck,LegNeato/buck,zpao/buck,Addepar/buck,SeleniumHQ/buck,zpao/buck,shs96c/buck,rmaz/buck,kageiit/buck,Addepar/buck,Addepar/buck,romanoid/buck