Forge workspace resolver fails to resolve local resource dependencies that are specified as <optional>

This needs to be fixed in the ClasspathWorkspaceReader - which needs to attempt to parse the POMs and locate any sub <module> projects that satisfy the dependency:

https://github.com/forge/furnace/blob/master/manager/resolver/maven/src/main/java/org/jboss/forge/furnace/manager/maven/ClasspathWorkspaceReader.java#L38