Fixes #1284 by renaming the event properties for LOGIN_CONNECTED_SITE_INFO_SUCCEEDED to conform to the tracks property naming convention. Also added a new property called login_calculated_has_jetpack to make it easier to report on whether or not jetpack is active and connected since determining that requires looking at several properties.

Logcat event:

Tracked: login_connected_site_info_succeeded, Properties: {"is_wp_com":"false","has_jetpack":"true","is_wordpress":"true","login_calculated_has_jetpack":"true","is_jetpack_active":"true","url_after_redirects":"http:\/\/testwooshop.mystagingwebsite.com","exists":"true","is_jetpack_connected":"true","url":"testwooshop.mystagingwebsite.com"}

I already verified in Tracks the new events are properly being saved, so the reviewer need only approve and merge :)

This fix has been built off of the 2.2 release tag in the hopes that we can get it released as a hotfix.

cc: @jkmassel @loremattei