BZ #1033243 - False Positive Warning when executing foreman_client.sh

https://bugzilla.redhat.com/show_bug.cgi?id=1033243
Patch adds text explaining 'no node definition' error to the user.
Merge pull request #58 from jguiditta/bz1033243_client_output

BZ #1033243 - False Positive Warning when executing foreman_client.sh