Enable xtrace on start scripts
Enable xtrace on start scripts

This helps operators more accurately see the start up sequence of
containers, especially in the case where they fail and we want to see
the last command executed.

Change-Id: I8a5765f09d52bb11d5af5aa8886746c87757ea5f

openstack/kolla,rahulunair/kolla,openstack/kolla,rahulunair/kolla,nihilifer/kolla,nihilifer/kolla,stackforge/kolla,stackforge/kolla,stackforge/kolla