Updating parent to 1.9
Removing inherited distribution management
Removing inherited release config
Removing inherited javadoc config

Also, failOnError is default behaviour, so no need to override
Removing inherited source plugin
Removing nexus plugin.

Is unused and inherited
Removing inherited gpg config and release profile
Adding missing parent config to arena-xtend
Merge pull request #5 from uqbar-project/uqbar-parent-1.9

Uqbar parent 1.9