util.jsonschema: Ignore some further test cases for URI references Full-URI references are not implemented

util.jsonschema: Sort test cases to skip Piped trough `sort -g`

util.datetime: Add some missing test cases You guessed it, mutation testing.

util.roles: Fix tests to use autogenerated role id

util.roles: Add some more missing test cases Found via mutation testing.

util.promise: Fix field name in failing test (introduced in 2639e0e1c378)

util.promise: Add some missing test cases (found through mutation testing)

util.promise: Remove line that was supposed to be removed in eb9814372c54

util.promise: Remove some redundant checks, add tests confirming redundancy This lines don't appear to do anything useful, and all tests pass when they are removed. Discovered via mutation testing. I added extra tests to exercise this code, because I wasn't certain that there were no side-effects caused by removal. Everything appears to be fine, thanks to the "pending" check at the start of promise_settle().

util.roles: Add a :policies() method to iterate through available policies We don't expose the policies directly, to force people to go through :may(). However, there are times when we really just need to know what policies a role has inside it (e.g. for reporting or debugging purposes).