[fix] fixed distribution unpacked folder name to fit for osiam dist

I removed the finalName so the unpacked folder of the zipped distribution fit to the standard... this is required to fit to the standard process in the osiam distribution: https://github.com/osiam/distribution/pull/8

also the created war now named with it's version, e.g. addon-administration-1.1-SNAPSHOT.war before that fix it was without the version: addon-administration.war. Does this named war needed by someone? Please check before merge.

the 3 lines can be deleted. the assembly gets the correct name.