Every developer should commit all the files that need to be changed
in a given set of changes. The go.sum file was not being generated
as expected since the update to go modules. Since the Jenkinsfile
was running make mod.check, the build was ending up with a modified
file, which caused a dirty tag on the build. Now it is expected
that each PR will merge with the corresponding go.sum changes.
Signed-off-by: Travis Nielsen <tnielsen@redhat.com>