Enhancement: Throttle warning

[MScottBlake]

I'm getting hit with this warning twice per recipe and while I understand the importance of displaying it, the level of spam makes it difficult to pick out relevant error messages. Is there any way it can be set to only display it once in a single Autopkg run and hide the rest?

/Library/Python/2.7/site-packages/python_jss-0.5.2-py2.7.egg/jss/contrib/requests/packages/urllib3/connection.py:251: SecurityWarning: Certificate has no `subjectAltName`, falling back to check for a `commonName` for now. This feature is being removed by major browsers and deprecated by RFC 2818. (See https://github.com/shazow/urllib3/issues/497 for details.)
  SecurityWarning

[sheagcraig]

@MitchelSBlake Indeed, a lot of requests go through, and to have each one throw a warning is pretty annoying. Without going into the implications of the warning itself, which I assume you can figure out on your own, there should be a way to disable the warnings entirely.

urllib3 has a disable_warnings method which should do it.

I'm preparing a release right now-let me drop in an optional input variable to cover this.

[sheagcraig]

I'll probably put it in python-jss and just let JSSImporter use it rather than set it directly itself.

[sheagcraig]

Done. Going into 0.3.5/python-jss v0.5.3.