code cleanup, unit tests, ssn eq class update

Few random code cleanup changes.Efficiency improvements, removal of redundant activities, removal of deprecated functions.

Additional unit tests for the EquivalenceClassTransformer at a method/functional/unit level

Replacement of the SSN EquivalenceClassTransformer function with a robust version of it

Signed-off-by: Nilkamal Weerasinghe <wnilkamal@yahoo.com>