JENKINS-12134 - Make fingerprinting artifacts optional.
Don't create a FingerprintAction unless there are actual fingerprints to add.
Merge remote branch 'upstream/master'
Merge branch 'master' of https://github.com/kprantis/copyartifact-plugin into kprantis-master

Conflicts:
	src/main/java/hudson/plugins/copyartifact/Copier.java
	src/main/java/hudson/plugins/copyartifact/CopyArtifact.java
	src/test/java/hudson/plugins/copyartifact/CopyArtifactTest.java
- Fingerprint Artifacts should be enabled by default
- Added German translation
- Added Test that old config.xml are imported with Fingerprint Artifacts enabled
- Updated maven-hpi-plugin in pom.xml to make hpi:run work again