Revert "Share Mocha's test context in setup-test-factory."
Revert "Share Mocha's test context in setup-test-factory."

This reverts commit 36999127746b188b0eb799e905eaac56abc97b26.

switchfly/ember-mocha,emberjs/ember-mocha,cowboyd/ember-mocha,cowboyd/ember-mocha,cowboyd/ember-mocha,emberjs/ember-mocha,switchfly/ember-mocha,switchfly/ember-mocha