Merge pull request #45 from dennishendriksen/master

Fix FindBugs warnings + Move jetty plugin to pluginManagement block
Don't start jetty in the build process.
Merge branch 'master' of https://github.com/molgenis/molgenis-palga

Conflicts:
	pom.xml
Fix decorators
Merge pull request #47 from fdlk/fix/decorators

Fix/decorators
Add default aggregation threshold for palga
Fix PalgaSample repository registration