[misc] add an old id that has been used in 2.1.x, x<7 erroneously

thanks to tmortagne for pointing this out
[misc] update version number

did not happen by the release plugin, as it was called
without -Pintegration-tests
[maven-release-plugin] prepare release application-mocca-calendar-2.2.2
[maven-release-plugin] prepare for next development iteration
Merge branch 'stable-2.2.x'

Conflicts:
	application-mocca-calendar-tests/pom.xml
	application-mocca-calendar-ui/pom.xml
	pom.xml
(the version numbers, again ...)