Require everything except the global extensions of class and object. This
supports wrapping rspec‘s mocking functionality without invading
every object in the system.
Required files
rspec/mocks/extensions/instance_exec
rspec/mocks/method_double
rspec/mocks/methods
rspec/mocks/argument_matchers
rspec/mocks/proxy
rspec/mocks/test_double
rspec/mocks/mock
rspec/mocks/argument_list_matcher
rspec/mocks/message_expectation
rspec/mocks/order_group
rspec/mocks/errors
rspec/mocks/error_generator
rspec/mocks/space
rspec/mocks/serialization
rspec/mocks/any_instance
rspec/mocks/stub_const