Production Web UI end to end testing

Testing protocol:

• Entry point: search box
• Search terms:
  • random (successful) origin
  • known metadata
  • known object PID
• For each search term, browse result:
  • Chaos Monkey (click random links and record traces up to a given depth)
  • Robotic Roberto (targeted click patterns reproducing "demo" scenarios)

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Migrated from T2125 (view on Phabricator)