Remove test_instance_update_with_instance_id test
Remove test_instance_update_with_instance_id test

test_instance_update_with_instance_id is identical to
test_instance_update_with_instance_uuid due to uuid conversion.
Remove it for simpilcity.

Change-Id: Ib348522900a62d6f7340357cac5f4a03c6163016

n0ano/gantt,n0ano/gantt