Server dependency pom

Adding a new dependency pom, for the UPS server.

Benefit: in the future we will have different WAR modules (e.g. ups-wildfly, ups-eap, ups-tomee, ...). The core of the UPS dependencies are tracked in the new module, to avoid duplication of depenencies and errors, maintaining the same dependencies on different modules.


For merger: Merge into the `KeycloakBeta4_no_bootstrap` branch 
`server-min` is not really self-explanatory (what does that even mean?)

what about {{server-deps}} or {{server-depchain}}? {{server-dependencies}} works fine.