Decouple fcrepo-camel code from fcrepo4 server code

This partially addresses https://jira.duraspace.org/browse/FCREPO-1268

Specifically:

  * This decouples fcrepo-camel from fcrepo server code, resulting in no runtime dependencies on fcrepo4
  * replaces a containerized version of fuseki with an embedded fuseki server for testing
  * added more constant values for interfacing with Fedora's JMS system, and added appropriate unit and integration tests
  * renamed classes to make the naming convention consistent (Fedora -> Fcrepo)
  * cleaned up maven config, including adjusting parent pom and adding release plugins