Add support for workspace-free configuration of deegree

[tfr42]

Support for cloud-native configuration style.

• be more explicit in the configuration, example would be concepts introduced by Cloud Foundry
• be more stateless by getting environment specific information from the environment and not from the deegree workspace (state is stored in local filesystem)
• be more micro by splitting deegree heavy weight deployment bundle into a more microservices like self-contained system using technologies like docker, kubernetes (deegree Cloud Native/deegreeCN)

[tfr42]

See https://github.com/deegree/deegree3/wiki/Workspace for more information about the current deegree workspace concept.

[tfr42]

See https://github.com/deegree/deegree3/wiki/WorkspaceNG for a proposal how to proceed. The GeoServer community accomplished this with the https://github.com/camptocamp/geoserver-microservices project. A lot of good ideas regarding configuration of those services.