Disable the JDK 6 and 7 builds on this branch -- no point loading up Travis.
Disable the JDK 6 and 7 builds on this branch -- no point loading up
Travis.

parrt/antlr4,chandler14362/antlr4,parrt/antlr4,Pursuit92/antlr4,chandler14362/antlr4,chandler14362/antlr4,antlr/antlr4,parrt/antlr4,chandler14362/antlr4,chandler14362/antlr4,parrt/antlr4,antlr/antlr4,antlr/antlr4,chandler14362/antlr4,parrt/antlr4,parrt/antlr4,ericvergnaud/antlr4,parrt/antlr4,wjkohnen/antlr4,antlr/antlr4,ericvergnaud/antlr4,ericvergnaud/antlr4,chandler14362/antlr4,ericvergnaud/antlr4,antlr/antlr4,wjkohnen/antlr4,antlr/antlr4,Pursuit92/antlr4,ericvergnaud/antlr4,Pursuit92/antlr4,antlr/antlr4,parrt/antlr4,parrt/antlr4,Pursuit92/antlr4,parrt/antlr4,wjkohnen/antlr4,antlr/antlr4,Pursuit92/antlr4,Pursuit92/antlr4,antlr/antlr4,ericvergnaud/antlr4,wjkohnen/antlr4,wjkohnen/antlr4,wjkohnen/antlr4,wjkohnen/antlr4,Pursuit92/antlr4,chandler14362/antlr4,Pursuit92/antlr4,chandler14362/antlr4,ericvergnaud/antlr4,ericvergnaud/antlr4,antlr/antlr4,Pursuit92/antlr4,wjkohnen/antlr4,ericvergnaud/antlr4,ericvergnaud/antlr4,wjkohnen/antlr4