Function: registerNewRewardToken(address newRewardToken)
This registers a new reward token.
Inputs
newRewardTokenControl: Completely controlled by the caller.
Constraints: Cannot be a zero address.
Impact: Address of the token to be registered as a reward token.
Branches and code coverage
Intended branches
New reward token is registered when called by
TOKEN_MANAGER.
Negative behavior
Revert if not called by the token manager.
Revert if token is already registered.