thrift-0.9.0 warning

[abashinyan]

Hello, when i use ok_hbase gem i get many warning, i think solutions to this is only update thift gem from 0.9.0 to 0.9.1 Apache Thrift Jira

../.rvm/gems/ruby-2.1.0/gems/thrift-0.9.0/lib/thrift/protocol/json_protocol.rb:21: warning: class variable access from toplevel ../.rvm/gems/ruby-2.1.0/gems/thrift-0.9.0/lib/thrift/protocol/json_protocol.rb:22: warning: class variable access from toplevel ../.rvm/gems/ruby-2.1.0/gems/thrift-0.9.0/lib/thrift/protocol/json_protocol.rb:23: warning: class variable access from toplevel ../.rvm/gems/ruby-2.1.0/gems/thrift-0.9.0/lib/thrift/protocol/json_protocol.rb:24: warning: class variable access from toplevel ../.rvm/gems/ruby-2.1.0/gems/thrift-0.9.0/lib/thrift/protocol/json_protocol.rb:25: warning: class variable access from toplevel ../.rvm/gems/ruby-2.1.0/gems/thrift-0.9.0/lib/thrift/protocol/json_protocol.rb:26: warning: class variable access from toplevel ../.rvm/gems/ruby-2.1.0/gems/thrift-0.9.0/lib/thrift/protocol/json_protocol.rb:27: warning: class variable access from toplevel ../.rvm/gems/ruby-2.1.0/gems/thrift-0.9.0/lib/thrift/protocol/json_protocol.rb:28: warning: class variable access from toplevel ../.rvm/gems/ruby-2.1.0/gems/thrift-0.9.0/lib/thrift/protocol/json_protocol.rb:29: warning: class variable access from toplevel ../.rvm/gems/ruby-2.1.0/gems/thrift-0.9.0/lib/thrift/protocol/json_protocol.rb:31: warning: class variable access from toplevel ../.rvm/gems/ruby-2.1.0/gems/thrift-0.9.0/lib/thrift/protocol/json_protocol.rb:33: warning: class variable access from toplevel ../.rvm/gems/ruby-2.1.0/gems/thrift-0.9.0/lib/thrift/protocol/json_protocol.rb:34: warning: class variable access from toplevel ../.rvm/gems/ruby-2.1.0/gems/thrift-0.9.0/lib/thrift/protocol/json_protocol.rb:35: warning: class variable access from toplevel