Bug 24545: Fix find-license-problems.t to catch future wrong license statements

Bug 24545: Fix find-license-problems.t to catch future wrong license statements

File adjust to run tests and be executed on all our codebase.

Test plan:
- Apply this patch without the other one
- run the tests
=> Several failures
- apply the other patch
- run the tests
=> Should pass now

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>