keystone: exit on errors; cleanup
keystone: exit on errors; cleanup

Cause keystone start script to exit on any errors (permitting kubernetes
to reschedule the pod).

Closes-bug: 1379057
Change-Id: Ide2eac6495250c8cba91cf9b7409dcb313f6f74b

tonyli71/kolla,GalenMa/kolla,openstack/kolla,meticulo3366/kolla,invenfantasy/kolla,fdumpling/kolla,intel-onp/kolla,intel-onp/kolla,negronjl/kolla,dardelean/kolla-ansible,meticulo3366/kolla,bdastur/kolla,mandre/kolla,coolsvap/kolla,stackforge/kolla,rajalokan/kolla,GalenMa/kolla,mandre/kolla,LoHChina/kolla,nihilifer/kolla,coolsvap/kolla,HackToday/kolla,limamauricio/mykolla,nihilifer/kolla,rajalokan/kolla,bdastur/kolla,tonyli71/kolla,chenzhiwei/kolla,invenfantasy/kolla,toby82/kolla,fdumpling/kolla,thetrav/kolla,HackToday/kolla,rahulunair/kolla,rajalokan/kolla,fdumpling/kolla,chenzhiwei/kolla,limamauricio/mykolla,rahulunair/kolla,openstack/kolla,mrangana/kolla,LoHChina/kolla,LoHChina/kolla,jakedahn/kolla,coolsvap/kolla,jasonbrooks/kolla,brk3/kolla,dardelean/kolla-ansible,mandre/kolla,HackToday/kolla,negronjl/kolla,chenzhiwei/kolla,thetrav/kolla,jakedahn/kolla,limamauricio/mykolla,jasonbrooks/kolla,stackforge/kolla,brk3/kolla,negronjl/kolla,jakedahn/kolla,mrangana/kolla,toby82/kolla,invenfantasy/kolla,dardelean/kolla-ansible,toby82/kolla,stackforge/kolla