Set language level to JDK 1.6 in exopackage code
Set language level to JDK 1.6 in exopackage code

Summary:
This should still be Gingerbread compatible, so let's avoid
try-with-resources and stuff.

Test Plan: Some warning in IntelliJ went away.  I forget what it was.

fbshipit-source-id: 5618bc9

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