Added multiple URLs support in FinderFactory

[mackdk]

What does this PR change?

This PR fixes how FinderFactory associates the packages to their physical locations. In fact, the class is currently based on the wrong assumption that a package maps to only one physical location. In reality, a package can be available on the classpath from multiple directories/jars.

This is currently not an issue as the test and production code is compiled and bundled together by the ant build file, but it will be if we want to properly separate them, split the production code into separate modules and/or we move to any other build tool that separates the main and test context (like Maven/Gradle). In this cases the Finder, as it is currently implemented, won't be able to resolve the resources (for example, the hibernate mappings) that are in different jar/context but shares the same package.

This change evaluates instead all the possible URLs for a package and processes them all with the correct Finder, aggregating the results.

GUI diff

No difference.

• DONE

Documentation

• No documentation needed: only internal and user invisible changes

• DONE

Test coverage

• No tests: already covered

• DONE

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[github-actions]

Suggested tests to cover this Pull Request

• srv_monitoring
• proxy_cobbler_pxeboot
• srv_rename_hostname
• proxy_branch_network
• allcli_sanity