GH-916 Regional Blackouts Timeout Bug

During rehearsal testing an unintended timeout was discovered when a multi message program start and program end SCTE cue triggered a validation session.

• Ad-Hoc Multi-Message Cue Test
  Test a single (baseline) and duplicate (reproduce the issue) multi-message SCTE payload using ad-hoc cues.
• In-Stream Multi-Message Cue Test
  Test a single (baseline) and duplicate (reproduce the issue) multi-message SCTE payload using in-stream cues in a mock manifest.