[MNG-4368] DefaultArtifactInstaller should only overwrite files if timestamp has changed o Revised to install upon any difference in file timestamp or length
maven/maven-2/branches/maven-2.2.x/
maven/maven-2/branches/maven-2.2.x/maven-artifact-manager/src/main/java/org/apache/maven/artifact/installer/DefaultArtifactInstaller.java