[RAILS] Update dependencies for JRuby compatibility

Author: estolfo

elasticsearch-rails/elasticsearch-rails.gemspec

@@ -29,7 +29,6 @@ Gem::Specification.new do |s|
   s.add_development_dependency "elasticsearch-extensions"
   s.add_development_dependency "elasticsearch-model"
 
-  s.add_development_dependency "oj" unless defined?(JRUBY_VERSION)
   s.add_development_dependency "rails",  ">= 3.1"
 
   s.add_development_dependency "lograge"
@@ -40,7 +39,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "mocha"
   s.add_development_dependency "turn"
   s.add_development_dependency "yard"
-  s.add_development_dependency "ruby-prof"
+  s.add_development_dependency "ruby-prof" unless defined?(JRUBY_VERSION)
   s.add_development_dependency "pry"
 
   s.add_development_dependency "simplecov"