disable the updates module by default

I feel this is necessary because I recently started receiving unsolicited email from AnswerHub, trying to get me to migrate from OSQA to their commercial product. I asked the parent company (Dzone) how they got my email address, and the email address of all of the site admins for my OSQA site, and the reply was "These contacts came from people who are the super users in OSQA installations.  This data is sent back to us on the first install."

I checked the code and found that the data is actually collected every day, when OSQA pings https://updater.osqa.net.

Since this is happening without the site operator's knowledge or consent (no mention of it in the license, readme, etc) I think this module should be disabled by default.