Fix build for the new resource state model and make Docker image version-agnostic
- pom: depend on org.etsi.osl.model.tmf 2.0.0-SNAPSHOT (1.5.0-SNAPSHOT was never published) and bump the version to 1.0.0-SNAPSHOT - Dockerfile: find the -exec jar by wildcard and keep its versioned name in the image, so a version bump no longer needs a Dockerfile change; JAR_FILE build-arg allows an override - .gitignore: ignore Eclipse, IntelliJ, VS Code and OS files, and untrack the Eclipse project files already in the repo Refs #2