SSTemplateUpdate.py:
* Added exception handling for case where an exception is thrown
in the re.match() block when checking to see if the changelist
description has the NO_CBD tag.
* Generiziced some comments.
* Started to add logic to avoid stripping the 'import @' entry if the
revision specifier is a changelist nubmer, since import@
as of 2014.1 now supports this. But then adjusted to avoid writing @change numbers in the revision specifiers to avoid potential user
confusion when change specifiers are made in more than one place (i.e.
in the *.cbdsst file and the live server stream spec).
There is still the possibility users might add @change values to
stream specs directly. Do we need a stream spec validator to prevent
users from adding @change to import lines, and if possible messaging
the user and letting them know they need to update the *.cbdsst file
instead if they try adding @change to import entries on the live
stream spec?