Fix typo, needs squashing

Signed-off-by: Jimmy Da <jda@pivotallabs.com>
Add v2.x API tests for unbinding and unprovision

Signed-off-by: Jimmy Da <jda@pivotallabs.com>
Add tests for broker response error codes and some refactoring

Signed-off-by: Jimmy Da <jda@pivotallabs.com>
Refactored api tests

Signed-off-by: Jimmy Da <jda@pivotallabs.com>