Change Java 7 or lower warning to error.
Change Java 7 or lower warning to error.

Test Plan: CI

Reviewed By: aiked

fbshipit-source-id: c44a941

JoelMarcey/buck,justinmuller/buck,JoelMarcey/buck,shs96c/buck,clonetwin26/buck,SeleniumHQ/buck,zpao/buck,robbertvanginkel/buck,k21/buck,shybovycha/buck,LegNeato/buck,darkforestzero/buck,brettwooldridge/buck,robbertvanginkel/buck,ilya-klyuchnikov/buck,sdwilsh/buck,marcinkwiatkowski/buck,marcinkwiatkowski/buck,zhan-xiong/buck,JoelMarcey/buck,marcinkwiatkowski/buck,robbertvanginkel/buck,justinmuller/buck,daedric/buck,SeleniumHQ/buck,grumpyjames/buck,shs96c/buck,shybovycha/buck,davido/buck,grumpyjames/buck,nguyentruongtho/buck,grumpyjames/buck,vschs007/buck,zhan-xiong/buck,LegNeato/buck,LegNeato/buck,illicitonion/buck,shs96c/buck,daedric/buck,clonetwin26/buck,vschs007/buck,darkforestzero/buck,robbertvanginkel/buck,davido/buck,darkforestzero/buck,daedric/buck,romanoid/buck,romanoid/buck,daedric/buck,SeleniumHQ/buck,nguyentruongtho/buck,LegNeato/buck,marcinkwiatkowski/buck,zhan-xiong/buck,daedric/buck,facebook/buck,kageiit/buck,dsyang/buck,vschs007/buck,shs96c/buck,shybovycha/buck,shybovycha/buck,robbertvanginkel/buck,clonetwin26/buck,robbertvanginkel/buck,darkforestzero/buck,zhan-xiong/buck,vschs007/buck,justinmuller/buck,rmaz/buck,darkforestzero/buck,rmaz/buck,justinmuller/buck,vschs007/buck,zpao/buck,ilya-klyuchnikov/buck,LegNeato/buck,LegNeato/buck,grumpyjames/buck,ilya-klyuchnikov/buck,zhan-xiong/buck,k21/buck,nguyentruongtho/buck,illicitonion/buck,facebook/buck,romanoid/buck,shybovycha/buck,clonetwin26/buck,sdwilsh/buck,kageiit/buck,robbertvanginkel/buck,Addepar/buck,Addepar/buck,LegNeato/buck,Addepar/buck,justinmuller/buck,clonetwin26/buck,illicitonion/buck,daedric/buck,kageiit/buck,shybovycha/buck,kageiit/buck,shs96c/buck,darkforestzero/buck,sdwilsh/buck,dsyang/buck,k21/buck,k21/buck,LegNeato/buck,justinmuller/buck,illicitonion/buck,vschs007/buck,nguyentruongtho/buck,JoelMarcey/buck,JoelMarcey/buck,sdwilsh/buck,marcinkwiatkowski/buck,clonetwin26/buck,robbertvanginkel/buck,davido/buck,nguyentruongtho/buck,marcinkwiatkowski/buck,davido/buck,brettwooldridge/buck,SeleniumHQ/buck,shs96c/buck,romanoid/buck,facebook/buck,rmaz/buck,robbertvanginkel/buck,ilya-klyuchnikov/buck,rmaz/buck,sdwilsh/buck,davido/buck,ilya-klyuchnikov/buck,robbertvanginkel/buck,JoelMarcey/buck,shs96c/buck,facebook/buck,daedric/buck,robbertvanginkel/buck,dsyang/buck,davido/buck,Addepar/buck,Addepar/buck,vschs007/buck,robbertvanginkel/buck,rmaz/buck,Addepar/buck,SeleniumHQ/buck,SeleniumHQ/buck,k21/buck,k21/buck,ilya-klyuchnikov/buck,dsyang/buck,grumpyjames/buck,JoelMarcey/buck,k21/buck,illicitonion/buck,rmaz/buck,SeleniumHQ/buck,shs96c/buck,daedric/buck,illicitonion/buck,dsyang/buck,sdwilsh/buck,vschs007/buck,sdwilsh/buck,SeleniumHQ/buck,daedric/buck,sdwilsh/buck,ilya-klyuchnikov/buck,vschs007/buck,brettwooldridge/buck,brettwooldridge/buck,daedric/buck,shybovycha/buck,k21/buck,sdwilsh/buck,justinmuller/buck,Addepar/buck,clonetwin26/buck,SeleniumHQ/buck,zhan-xiong/buck,vschs007/buck,darkforestzero/buck,sdwilsh/buck,romanoid/buck,darkforestzero/buck,justinmuller/buck,clonetwin26/buck,shybovycha/buck,clonetwin26/buck,davido/buck,davido/buck,justinmuller/buck,shybovycha/buck,daedric/buck,zhan-xiong/buck,SeleniumHQ/buck,grumpyjames/buck,rmaz/buck,Addepar/buck,dsyang/buck,darkforestzero/buck,brettwooldridge/buck,clonetwin26/buck,illicitonion/buck,davido/buck,JoelMarcey/buck,daedric/buck,marcinkwiatkowski/buck,rmaz/buck,JoelMarcey/buck,romanoid/buck,shs96c/buck,facebook/buck,brettwooldridge/buck,grumpyjames/buck,brettwooldridge/buck,rmaz/buck,k21/buck,LegNeato/buck,ilya-klyuchnikov/buck,davido/buck,k21/buck,romanoid/buck,rmaz/buck,zhan-xiong/buck,brettwooldridge/buck,illicitonion/buck,zpao/buck,marcinkwiatkowski/buck,illicitonion/buck,grumpyjames/buck,shybovycha/buck,clonetwin26/buck,robbertvanginkel/buck,shs96c/buck,dsyang/buck,marcinkwiatkowski/buck,marcinkwiatkowski/buck,zpao/buck,rmaz/buck,sdwilsh/buck,brettwooldridge/buck,brettwooldridge/buck,illicitonion/buck,marcinkwiatkowski/buck,kageiit/buck,brettwooldridge/buck,marcinkwiatkowski/buck,zhan-xiong/buck,JoelMarcey/buck,sdwilsh/buck,zpao/buck,clonetwin26/buck,ilya-klyuchnikov/buck,illicitonion/buck,shs96c/buck,darkforestzero/buck,romanoid/buck,facebook/buck,romanoid/buck,vschs007/buck,Addepar/buck,grumpyjames/buck,dsyang/buck,Addepar/buck,justinmuller/buck,justinmuller/buck,ilya-klyuchnikov/buck,rmaz/buck,k21/buck,k21/buck,ilya-klyuchnikov/buck,zpao/buck,LegNeato/buck,brettwooldridge/buck,Addepar/buck,brettwooldridge/buck,davido/buck,davido/buck,shs96c/buck,davido/buck,SeleniumHQ/buck,JoelMarcey/buck,darkforestzero/buck,darkforestzero/buck,kageiit/buck,illicitonion/buck,daedric/buck,clonetwin26/buck,dsyang/buck,zpao/buck,SeleniumHQ/buck,dsyang/buck,marcinkwiatkowski/buck,zhan-xiong/buck,nguyentruongtho/buck,JoelMarcey/buck,zhan-xiong/buck,sdwilsh/buck,zhan-xiong/buck,LegNeato/buck,shs96c/buck,JoelMarcey/buck,vschs007/buck,vschs007/buck,ilya-klyuchnikov/buck,grumpyjames/buck,justinmuller/buck,Addepar/buck,grumpyjames/buck,illicitonion/buck,grumpyjames/buck,romanoid/buck,romanoid/buck,LegNeato/buck,kageiit/buck,zhan-xiong/buck,romanoid/buck,dsyang/buck,shybovycha/buck,rmaz/buck,LegNeato/buck,Addepar/buck,shybovycha/buck,dsyang/buck,romanoid/buck,facebook/buck,darkforestzero/buck,nguyentruongtho/buck,dsyang/buck,SeleniumHQ/buck,justinmuller/buck,k21/buck,shybovycha/buck,ilya-klyuchnikov/buck