Fix spelling of resolve-all-users parameter
Fix spelling of resolve-all-users parameter

lowercase_underscore is only used for fields in JSON, but not for
request parameters in the URL.

Signed-off-by: Edwin Kempin <d43fb6c98c97e553b671ed9a9318100f1de386e7@google.com>
Change-Id: Ibf0bfd2cd6f00ca27bb8129ddc46aa4505975c86

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