CTest: removed reference to now unused return value and additional cleanup
Merge topic 'locale-independent-date-in-test' into next

4531401 CTest: removed reference to now unused return value and additional cleanup
Tests: use string(TIMESTAMP) instead of system and locale specific date/time
Merge topic 'locale-independent-date-in-test' into next

0655d09 Tests: use string(TIMESTAMP) instead of system and locale specific date/time