Document verbosity field for check code owner config REST endpoint
Document verbosity field for check code owner config REST endpoint

Signed-off-by: Edwin Kempin <d43fb6c98c97e553b671ed9a9318100f1de386e7@google.com>
Change-Id: I12152ac292ee3b6d3f3b4206e680528acb75d460

GerritCodeReview/plugins_code-owners,GerritCodeReview/plugins_code-owners,GerritCodeReview/plugins_code-owners,GerritCodeReview/plugins_code-owners