All Database usage must go through framework.db (which should have been
the case before, anyways) or explicitly checkout and checkin a
connection. Failure to do so causes thread starvation and bizarre
random failures when attempting to use the database.
This commit also explicitly releases database connections at the end of
all threads created via framework.threads.spawn, which should alleviate
Deprecation Warning messages from ActiveRecord.
[Fixes#6613]
* Add new db tables for session & session_events
* Migrate existing session data from events db table
* Modify session report methods to log to the new tables
git-svn-id: file:///home/svn/framework3/trunk@12273 4d416f70-5f16-0410-b530-b9f4589650da
HD Moore
James Lee
Mike Smith