[BUGFIX] Fix wrong stdWrap implementation for paths in FLUIDTEMPLATE

Also adjust the tests to cover more cases.

Resolves: #70788
Releases: master
Change-Id: I60900638689c0f74fa77c624840da394144143ea
Reviewed-on: http://review.typo3.org/44102


Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>