Tests for newer simulate options

[jasonpaulos]

The following simulate request options do not have test coverage yet:

• round - If provided, specifies the round preceding the simulation. State changes through this round will be used to run this simulation. Usually only the 4 most recent rounds will be available (controlled by the node config value MaxAcctLookback). If not specified, defaults to the latest available round.
• allow-unnamed-resources - Allows access to unnamed resources during simulation.

We should create new tests and tag(s) for them. At the moment these are supported by the JS and Python SDKs