Exclude jruby-19mode from testing Rails 4.
Exclude jruby-19mode from testing Rails 4.

rafal-radziszewski/rpush,krakatoa/rpush,amaierhofer/rpush,eleostech/rapns,rpush/rpush,ileitch/rapns,rafal-radziszewski/rpush,aried3r/rpush,jmnsf/rpush,mandarin6b0/rpush,zakwanhaj/rpush,zenjoy/rpush,kjnsn/rpush,chiu/rpush,joshuairl/rpush