I also tried a nev VM with clean Centos 7.2(1511) without any updates and ipa-client 4.4
plus 'authconfig --enablenis --update'. This also results in hanging boot. Making
ipa-client4.4 my primary suspect. Unfortunatly I can not install any previous versions of
ipa-client via yum (version 4.2 worked fine for me) I did find an ipa-client4.2.rpm but it
fails on all kinds of dependencies that are also not available anymore.