Previously, LocalM2Resource used the pom's packaging configuration to
determine the suffix of the file that it should look for, e.g. if
the pom's packaging was jar, it would look for a file with a .jar
suffix in artifactExists(). This logic fails for artifacts with bundle
packaging as it would look for a .bundle file rather than a .jar file,
fail to find the file, and incorrectly report that the artifact does not
exist.
This commit updates LocalM2Resource to look for a file with a .jar
suffix when the packaging configuration in the pom is bundle.