[maven-release-plugin] copy for tag v1.2.0

Prepare release of v1.1.2

Prepare v1.1.1

Prepare v1.1.0

Prepare v1.0.0

And remove duplicate properties in build.xml

Merge pull request eXist-db#4 from dizzzz/master

Bumping to version 0.6 - preparing eXist-db 2.2