Format Node groovy script
Check for updates in a reliable way
Revert "Allow whole test harness to access Jenkins log"

This reverts commit f1ebfad560e351d26963b4a33d18cd1679694b5f.

Conflicts:
	src/main/java/org/jenkinsci/test/acceptance/po/ToolInstallation.java
Merge branch 'master' of github.com:jenkinsci/acceptance-test-harness