api-ref: Add fault parameter details
api-ref: Add fault parameter details

Add fault parameter details, according to following code.
https://github.com/openstack/nova/blob/stable/mitaka/nova/api/openstack/compute/views/servers.py#L239

This information is useful for troubleshooting.

Change-Id: I3a46c9aa87667e6eea07a5c560d0e108a1c03658

gooddata/openstack-nova,rajalokan/nova,gooddata/openstack-nova,alaski/nova,openstack/nova,alaski/nova,cloudbase/nova,phenoxim/nova,Juniper/nova,mikalstill/nova,Juniper/nova,vmturbo/nova,rahulunair/nova,rajalokan/nova,rajalokan/nova,vmturbo/nova,hanlind/nova,jianghuaw/nova,sebrandon1/nova,rahulunair/nova,jianghuaw/nova,mahak/nova,cloudbase/nova,klmitch/nova,rahulunair/nova,openstack/nova,mahak/nova,klmitch/nova,vmturbo/nova,mikalstill/nova,bigswitch/nova,phenoxim/nova,gooddata/openstack-nova,hanlind/nova,cloudbase/nova,rajalokan/nova,Juniper/nova,klmitch/nova,vmturbo/nova,sebrandon1/nova,klmitch/nova,bigswitch/nova,mikalstill/nova,sebrandon1/nova,openstack/nova,jianghuaw/nova,hanlind/nova,mahak/nova,gooddata/openstack-nova,jianghuaw/nova,Juniper/nova