CLC-3565, add rspec-its cuz will be removed from rspec-3
CLC-3565, rspec v3: be_true > be_truthy, be_false > be_falsey
Merge pull request #3057 from johncrossman/CLC-3565_rspec_upgrade

CLC-3565: gem rspec-its, be_true > be_truthy, be_false > be_falsey