Added new content to DC guide
List of impacted topics:
-Upgrade Management Overview
-Upgrading the SystemController Using the CLI
-Distributed Upgrade Orchestration Process Using the CLI
-Robust Error Handling During An Orchestrated Upgrade
-Failure Prior to the installation of N+1 Load on a Subcloud
-Failure During the Installation or Data Migration of N+1 Load on a Subcloud
- Removed section-> Failure Caused by Invalid Docker Registry Certificate
Story: TBD
Task: TBD
Signed-off-by: Adil <mohamed.adilassakkali@windriver.com>
Change-Id: I8538dd6bda8651d76964f64c250df627bace75cb