Update py-ms to 2.7.0

[pyup-bot]

This PR updates py-ms[all] from 2.6.1 to 2.7.0.

Changelog

2.7.0

**Features**
* Updated dependencies 158 
* Added config reload endpoint 174 - lcd1232 
https://py-ms.readthedocs.io/en/latest/configuration/reload-configuration-without-stopping-your-services
* Support multiprocessing metrics 179 - Agalin
* Added namespace on env vars with backward compatibility 191 - rapejim
Changed `CONFIGMAP_FILE` -> `PYMS_CONFIGMAP_FILE`, `KEY_FILE` -> `PYMS_KEY_FILE`
https://py-ms.readthedocs.io/en/latest/configuration/environments-variables-of-pyms

**Improvements**
* Added type hinting 167, 177 - Gavin

Links

• PyPI: https://pypi.org/project/py-ms
• Changelog: https://pyup.io/changelogs/py-ms/
• Repo: https://github.com/python-microservices/pyms/

[coveralls]

Coverage remained the same at 86.667% when pulling 9374e8f on pyup-update-py-ms-2.6.1-to-2.7.0 into 049f629 on master.