Added installer.help.close l10n message to langpack files already
containing installer.help, using http://littlsvr.ca/ostd/.
Merge pull request #136 from omniamutantur/IZPACK-793

IZPACK-793 Missing i18n string "installer.help.close"
Changed ConfigurationInstallerListenerTest to use AutomatedInstaller,
for testing in headless environments.
Merge branch 'master' into IZPACK-844