Update Play source for build compability with JDK9+ #1252

Merged

asolntsev merged 10 commits intoplayframework:masterfrom tomparle:master

Aug 7, 2018

+85-87

Commits on Aug 2, 2018

Commits on Aug 5, 2018

set java source and target version to use for the build, and remove unused conf file created by mistake
tomparle
committed

Commits on Aug 7, 2018

revert back method to static. Fix calls to deprecated '_' method, replaced by __loadClass because '_' is a reserved keyword from jdk9
tomparle
committed