EDIT

Increase Bundle-RequiredExecutionEnvironment to JavaSE-1.8

need to manage the itextpdf dependency in the parent pom.xml

Fix translation

Increase java code level to 1.8

ref #6527 Refactor configurator composite

Fix typo

ref #4611 Refactor string constants

ref #4611 l10n for DeleteConfiguration in taxeditor.store plugin

minor adaption to java 1.8

managing itextpdf dependency