Add spacewalk-setup-ipa-authentication to make the external authentication easier.

https://fedorahosted.org/spacewalk/wiki/SpacewalkAndIPA
add spacewalk-setup-ipa-authentication script to Makefile
fix condition

we need to continue, if packages were installed correctly
prevent ISE, when firstname a/o lastname weren't passed from IPA server
Automatic commit of package [spacewalk-setup] release [2.3.1-1].
Automatic commit of package [spacewalk-java] release [2.3.88-1].