Simplify decorator for auth validation

This MR simplifies the decorator used to apply auth validation to URLs, mainly to remove one level of nesting that isn't really needed.

changed milestone to %GWDataFind Server 1.1.0

added gwdatafind_server.authentication label

requested review from @duncan.meacher

assigned to @duncan.meacher

added 1 commit

• 0747a0e2 - gwdatafind_server.authentication: simplify decorator

Compare with previous version

mentioned in commit 96841028

merged