KickOut Should Not Throw

[katelynsills]

What is the Problem Being Solved?

Currently, we cannot kickOut multiple seats in one turn because kickOut throws. Instead, it should return an error which we can throw if we wish.

Description of the Design

zcfSeat.kickOut should return an error, and should not itself throw.

Security Considerations

We should make sure nothing depended on this functionality.

Test Plan
Current tests, also, perhaps adding a test in which multiple seats get kicked out in one turn.

[Chris-Hibbert]

Since no existing tests were impacted, it would be helpful to add some tests that exercise this both for a single seat and multiple seats.

[katelynsills]

Since no existing tests were impacted, it would be helpful to add some tests that exercise this both for a single seat and multiple seats.

Yup, will do.