Addressing review comments for 7920
Changes include :
- Changes variable name from tval to untypedValue in Insert and Mutate classes
- Fixed most of the review comments in the IT

Change-Id: I83197b63aa2874f0c7136ec4dc3b7b629b2407a7
Signed-off-by: Madhu Venugopal <mavenugo@gmail.com>