Use built-in jruby parser when running jruby

7 jobs for master in 1 minute and 55 seconds
Status Job ID Name Coverage
  Syntax
passed #548
ruby
jruby_1.7

00:00:45

passed #549
ruby
jruby_9.1

00:00:58

passed #544
ruby
ruby_2.1

00:00:30

passed #545
ruby
ruby_2.2

00:00:42

passed #546
ruby
ruby_2.3

00:00:36

passed #547
ruby
ruby_2.4

00:00:44

 
  Linting
passed #550
ruby
rubocop

00:00:54