Improper limitation of paths in py-aspect-model-loader

In esmf-sdk-py-aspect-model-loader versions 2.1.2 to 2.2.1, the Aspect Model loader resolves cross-file model references by extracting the third and fourth colon-separated components of any urn:samm:… namespace declared in a parsed Turtle file to build a directory to scan. A model file containing @prefix x: <urn:samm:../../../foo:bar#> or @prefix x: <urn:samm:/abs/path:bar#> causes the loader to glob and parse *.ttl files from arbitrary directories outside the intended models root, merging their contents into the returned graph.