[Deployment overlay] Inconsistent error messages

Problem
Following commands produces different error message even though the problem is same - not existing deployment overlay.

• command:
  deployment-overlay list-content --name=not-existing-overlay
  and remove operation
  output:
  Failed to load the list of the existing content for overlay not-existing-overlay: {
  "outcome" => "failed",
  "failure-description" => "WFLYCTL0216: Management resource '[(\"deployment-overlay\" => \"not-existing-overlay\")]' not found",
  "rolled-back" => true,
  "result" => undefined
  }
• command:
  deployment-overlay list-links --name=not-existing-overlay
  output:
  Empty output
• command:
  deployment-overlay redeploy-affected --name=not-existing-overlay
  None of the deployments affected.
• command:
  deployment-overlay link --deployments=jboss-ejb-in-war.war --name=not-existing-overlay
  output:
  {"WFLYCTL0062: Composite operation failed and was rolled back. Steps that failed:" =>
  Unknown macro: {"Operation step-1" => "WFLYCTL0175}

  }

• command:
  deployment-overlay upload --deployments=jboss-ejb-in-war.war --name=not-existing-overlay
  output:
  Deployment overlay not-existing-overlay does not exist.

Proposed solution
Unify message as possible.