[maven-release-plugin] copy for tag JUnitDiff-2.0.0

[maven-release-plugin] copy for tag JUnitDiff-1.5.4

[maven-release-plugin] copy for tag JUnitDiff-1.5.3

[maven-release-plugin] copy for tag JUnitDiff-1.5.2

[maven-release-plugin] copy for tag JUnitDiff-1.5.1