[BUGFIX] Fetch correct module-URL including security token

Needed for compatibility to TYPO3 CMS 6.2 which introduced
the additional security-token. Function getModuleUrl()
exists since TYPO3 6.0, so this is backward-compatible.

Change-Id: I341d6aa5088664de80074d34aae4419292b4470c
Releases: 0.3.0
Resolves: #56872
Merge "[BUGFIX] Fetch correct module-URL including security token"