org.sonatype.maven.polyglot.TeslaModelProcessor.read(Reader, Map<String, ?>) should not assume replacement pom is always a readable file

[laeubi]

When reading the replacement model TeslaModelProcessor always assumes that the location is an (existing) file that can be read via an inputstream by creating an FileModelSource and then passing the inputstream to the ModelReader.

This has the drawback that file must exist and be located on the local filesystem as a physical, readable file.

a simple fix would be not to call org.apache.maven.model.io.ModelReader.read(InputStream, Map<String, ?>) but org.apache.maven.model.io.ModelReader.read(File, Map<String, ?>)