Remove passing rubies from allow_failures list
Refactor specs for Axiom::Types::Options

* Update to use a simpler way to check to see if the methods
  are responded to. The previous way fails in jruby.
Remove explicit constraint on the return value

* The documented return value is a Boolean, and that should be
  enough. Any return value besides a Boolean is not guaranteed to
  work, and in the future may throw exceptions should type checking
  based on the YARD docs ever be implemented in the specs.
Remove unnecessary references to an instance variable
Change conditional into a guard clause
Update flay threshold
Add JRUBY_OPTS to jruby configuration
Update travis to not email on success, and only on change for failure