Distributed tests were failing every now and then because the test
plugin didn't implement retry's and the test server wasn't always
starting up fast enough. I fixed this by refactoring the tests to use
the real TLS plugin, which has retry logic. This required some mangling
of the configuration options, which should serve as a good reference as
well.
Before, osqueryd would send `osquery/OSQUERY_BUILD_VERSION` as the user agent and appeared broken. I copied the logic from the osquery version table and used that var here also so the user agent now reads 1.4.7
First draft of the enrollment plugin and part of the config plugin.
Please comment on potential structure and functionality.
They way it's designed to work is this:
Both the config and logger plugins will call the enroll getKey function. getKey
is in charge of maintaining the state of having a key and doing the enrollment.
If enroll has a key, then it will instantly return doing no HTTP requests, if it
doesn't, then it will try a few times to get a key, if it's not successful, it
fails and returns an empty string, if it succeeds, then it will return the
client enrollment key for the requester to use.
