Added new maven profile (-Proda) to generate scape-platform-datamodel jar for RODA use

As RODA already depends of some of the standards used by the scape platform datamodel (e.g. mets, dc, etc), some jaxb tweaks must be made in order to avoid java package name collisions.
So, every time a change is made in the scape platform datamodel, we need to apply jaxb changes and change package names in java code so we can recompile it and use it in RODA.
Those changes have been automatized, using mvn plugins, and are available through the roda profile (-Proda).