Changed to better handle response code 404 when no data available for a
route. Previously was logging an error but it wasn't really an error and
it made it harder to find real errors in the log file. Changed so that
now it is logged as info when 404 is returned.
Fixed (commented out) loging of SQL parameters so that additivity is
false so that they don't show up in both the regular log file as well as
the sql one. Only want them in the sql log file.
Many changes done to get updating of travel times to fully work. Changed
how db sessions are handled so that data is successfully written to
database. This is critical because previously was calling saveOrUpdate()
on data that was read in, which was causing problems where Hibernate was
deleting stop paths from trip patterns for no apparent reason. Instead,
just need to make necessary changes within a transaction and when the
transaction and session are closed then all "dirty" objects are
automatically written.

Also greatly changed how the active revision is handled. No more sandbox
rev. Instead, a new revision is written with a new configRev and it can
be switched to via ActiveRevisions db table without having to copy the
revision.  This greatly simplifies handling of revisions.

Also, fixed some issues with updating of travel times where had some
bugs that were causing the data to not all be handled correctly.