* Similar to suppress-graph
There are some gate failures that are expected and are real errors (such
as global-requirements mismatches in requirements jobs).
suppress-notifications allows us to classify these failures and remove
them from the unclassified page while not telling developers to recheck.
This can be used along with suppress-graph.
Change-Id: I6d905ba65e66e799a65598f8a5d5c3dd684feb8c