add a log when ccm start failed
add a log when ccm start failed

has following error when start ccm after a unexpected update in
configuration of openstack config file

error building controller context: cloud provider could not be initialized:
could not init cloud provider "openstack": Resource not found

'Resource not found' is not really helpful here..

kubernetes/cloud-provider-openstack,kubernetes/cloud-provider-openstack,kubernetes/cloud-provider-openstack