Multi-module dependencies incorrectly marked as unused

MDEP-72 made DefaultProjectDependencyAnalyzer.buildArtifactClassMap() only consider jar files, i.e.:

if ( file != null && file.getName().endsWith( ".jar" ) )

This causes it to ignore all classes defined in a submodule of a multi-module project. See the attached example. It has two submodules:

• a, which defines an interface Foo
• b, which defines a class FooImpl that implements Foo

Running "mvn dependency:analyze" results in:

[WARNING] Unused declared dependencies found:
[WARNING]    com.example:a:jar:0.0.1-SNAPSHOT:compile

The following change fixes the issue:

if ( file != null && (file.getName().endsWith( ".jar" ) || file.isDirectory()) )