Switch nodejs to domcleal/ignore-exitcode to work around "npm list -g"

Switch nodejs to domcleal/ignore-exitcode to work around "npm list -g" returning non-zero exit codes: https://bugzilla.redhat.com/show_bug.cgi?id=986422

Our hosts are all currently trying to reinstall npm packages as they're not picking up on installed packages.

Upstream PR: https://github.com/puppetlabs/puppetlabs-nodejs/pull/56