Last-minute fix for a problem with Emailer for 2.1. The correct SMPT server was not being correctly fetched after being changed by the sysadmin because the Session.getDefaultInstance got the old version, now Session.getInstance creates a new one.
Removing lams_support@melcoe.mq.edu.au from the config table as it may be misleading to users, this is the email used by the Forgot Password functionality, and it will retrun undeliverable if someone tries to reply to it.
LDEV-1825: When we copy a learning design, make sure any grouping details and associated mappings attached to a teacher chosen branching or a define later grouped branching are not copied. If we don't do this, we encounter problems when run a design that has been attached to a lesson. Otherwise we either throw an exception (as the grouping doesn't exist) or we use the groupings that were used in the previous lesson and they may not be wanted.