Nightly downstream job failing with LinchpinAPI import errors

[Dannyb48]

Describe the bug
Our jobs are failing with the failing with the following error

 File "/home/jenkins/workspace/Carbon-Linchpin-Nightly/cbn/lib/python2.7/site-packages/carbon/provisioners/ext/linchpin_wrapper_plugin.py", line 83, in __init__
    self.linchpin_api = LinchpinAPI(self._init_context())
NameError: global name 'LinchpinAPI' is not defined

This is using latest development branch and python 2.7.

If open up a python console and try to perform the same import, I get the following error messages about the mock library, which I think is causing the import of the API to not work.

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/dbaez/.virtualenvs/linchpin-nightly/lib/python2.7/site-packages/linchpin/__init__.py", line 20, in <module>
    from mock import MagicMock
ImportError: No module named mock

To Reproduce
Steps to reproduce the behavior:

1. Install latest develop branch pip install git+https://github.com/CentOS-PaaS-SIG/linchpin.git@develop
2. open python console python
3. import the LinchpinAPI from linchpin import LinchpinAPI
4. See error

[samvarankashyap]

@Dannyb48 #1551 should fix this import error.