[Build] Import gpg key prior to release

Author: mpkorstanje

Makefile

@@ -52,6 +52,7 @@ update-changelog:
 .PHONY: .commit-and-push-changelog
 
 .release-in-docker: default update-changelog update-installdoc .commit-and-push-changelog-and-docs
+	[ -f '/home/cukebot/import-gpg-key.sh' ] && /home/cukebot/import-gpg-key.sh
 	mvn --batch-mode release:clean release:prepare -DautoVersionSubmodules=true -Darguments="-DskipTests=true -DskipITs=true -Darchetype.test.skip=true"
 	git checkout "v$(NEW_VERSION)"
 	mvn deploy -P-examples -P-compatibility -Psign-source-javadoc -DskipTests=true -DskipITs=true -Darchetype.test.skip=true