REST plugin should detect if an existing JAX-RS resource is mapped to the same @Path

When an existing resource in a project already maps to a Path, it may conflict with the JAX-RS resource newly created by the REST plugin.

The REST plugin should therefore create the JAX-RS resource only when it is certain (to a degree) that there are no conflicting paths.

This would have to be done for several cases including:

• JAX-RS resources
• JAX-RS sub-resources
• JAX-RS resources and sub-resources across projects (may have to wait until binary inspection can be done)