[Scenario] Add tag repo to containment policy
[Scenario] Expose tag component via Provider
[Scenario] Add tag repos as bootstraps in Activator
[Scenario] Explicitly initialize tag repo bootstraps
[Scenario] Move bootstrap components to provider

Move the introduction of the Scenario
plugin's bootstrap (top-level) components
from the Activator to the Provider in
order to utilize the new platform support
for this behavior provided by
nasa/mct#208
[Scenario] Added license to TagComponent