CLC-3565, more be_falsey/truthy for rspec upgrade
CLC-3565, rpsec 3 upgrade - spec_helper.rb: raise_errors_for_deprecations, infer_spec_type_from_file_location, mock tolerance
Merge pull request #3066 from johncrossman/CLC-3565

CLC-3565, rspec v3 upgrade - spec_helper.rb to raise errors for deprecated, etc.