Fix go.sum (openshift#991)

Problem: For some reason, a recent PR passed the Sanity check but master
has recorded that it fails the sanity check.

Solution: Update go dependencies

Signed-off-by: Alexander Greene <[email protected]>
Upstream-repository: operator-registry
Upstream-commit: 8a159e87243835a41b281b6b7221c0dca9132561

Author: awgreene