Fix frozen stubs to also stub out #frozen?

* This is required for rspec2. Making the change in master to make
  the conversion simpler.
Change rspec stub! to stub for consistency
Update rspec stubs to use a Hash and not and_return()
Fix specs to not use top-level context()
Merge branch 'master' into devtools

Conflicts:
	spec/unit/veritas/relation/operation/binary/class_methods/new_spec.rb