e2e: suppress progress messages for custom progress reporter
e2e: suppress progress messages for custom progress reporter

The custom progress reporter gets invoked via ginkgo.ReportAfterEach after each
test. The problem was that the e2e framework unconditionally enables Ginkgo's
-progress output which shows execution of all nodes, including this
ReportAfterEach. The effect were over 1000 lines of useless output at the start
of a test run while skipping disabled tests.

The solution is to tell Ginkgo that the ReportAfterEach isn't meant to be
reported.

openshift/kubernetes,openshift/kubernetes,openshift/kubernetes,csrwng/kubernetes,csrwng/kubernetes,bparees/kubernetes,openshift/kubernetes,csrwng/kubernetes,bparees/kubernetes,bparees/kubernetes,csrwng/kubernetes,bparees/kubernetes,bparees/kubernetes,csrwng/kubernetes,openshift/kubernetes