wcs-xml (extensions) depends on temporal (unsupported) preventing source distribution to build

This is just for using a single class. Please remove the dependency or take over temporal module and bring it up to supported status.
For the 2.5.5 release I've build the release with -Ptemporal to include it in the build, since I know there are people trying to use WCS parsing, but I recommend that the module be thrown back in unsupported if the issue is not fixed shortly (before next release, that is, within the month).