[TASK] Use ModuleTemplate API for EXT:tstemplate

Releases: master
Resolves: #69888
Change-Id: I9c8bf6a3aa52c2f5d6abcb8744f9c21e0a274719
Reviewed-on: http://review.typo3.org/43828


Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Frank Nägler <frank.naegler@typo3.org>
Tested-by: Frank Nägler <frank.naegler@typo3.org>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Markus Sommer <markussom@posteo.de>
Tested-by: Markus Sommer <markussom@posteo.de>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>