[JIRA] (OVIRT-1493) Update current DR documentation with info on storage setup

Update current DR documentation with info on storage setup ---------------------------------------------------------- Key: OVIRT-1493 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1493 Project: oVirt - virtualization made easy Issue Type: Task Reporter: eedri Assignee: Evgheni Dereveanchin Priority: Highest Following the last outage on oVirt storage servers, it seems that we are missing more info on how to debug and fix issues on the storage service. current documentation on http://ovirt-infra-docs.readthedocs.io/en/latest/Phoenix_Lab/Storage_Host... only shows configuration but doesn't include troubleshooting like what can we check or do in case any of the services that make the storage work fails.