fix AlternativeCompositeByteBuf byte[] getting

Signed-off-by: Christian Lüthold <biocodr@gmail.com>
pom.xml make jar executable

Signed-off-by: Christian Lüthold <biocodr@gmail.com>
implemented and tested Utils.isSameCollectionsSet

Signed-off-by: Christian Lüthold <biocodr@gmail.com>