cli: Error in "update network --cluster-identifier --usages-usage"

When running update network command, in cluster context,
including --usages-usage option causes an error.

Change-Id: I9a3347c4cd7397f0e58814c33bbf4b18e07547f2
Bug-Url: https://bugzilla.redhat.com/950993
Signed-off-by: Ravi Nori <rnori@redhat.com>