There seems to be a security vulnerability related to an outdated python package

@cgreene received the following notice:
```
Project Cognoma organization
Warning!     
cognoma / core-service

Known security vulnerabilities detected
Dependency pycrypto     Version <=2.6.1     
Vulnerabilities
CVE-2018-6594 Moderate severity
    Defined in requirements.txt     
```

It seems like this could be as simple as updating pycrypto and redeploying.