Extract method .load_yaml_configuration
Fail with TypeError if config file is malformed
Merge pull request #1511 from bquorning/hashify-configuration

Raise TypeError if the config file is malformed
Ruby 2.x specific specs should also be run on 2.1
Spec for RuboCop::Cop::VariableForce::Reference
Spec for VariableTable.find_variable edge case