Issue #231: Added tests for RtDeployKeys.get(), RtDeployKeys.create(), MkDeployKeys.get(), and MkDeployKeys.create()
Issue #231: Implemented methods RtDeployKeys.get(), RtDeployKeys.create(), MkDeployKeys.get(), and MkDeployKey.create(); minor fixes
Merge pull request #251 from asinyagin/issue231

#251: pull request Issue #231