[enhancement] removed sonatype parent and clearify maven profiles

* adjusted pom to maven code convention: http://maven.apache.org/developers/conventions/code.html
* introduced updated profile 'release', to release the connector4java to maven central, without the load of the sonatype parent pom
* updated integration profile to snapshot profile
* updated developer to the OSIAM team dev
* changed release tag from connector4java-{version} to v{version}, like the other OSIAM projects