The policy Id of All the token roles defined in the Marlowe Contract DSL
Optional
openRoleNames: string[]defines all the Roles to be Open (Others will be Closed)
It is under the user's responsability to create and distribute properly these role tokens
Configure Roles using tokens previously Minted. These Role Tokens are already defined (via an NFT platform, cardano-cli, another Marlowe Contract Created, etc.. )