Update CosmosSDK version to 0.36.0

[austinabell]

• Updates the CosmosSDK version from the specific commit to the released LTR
• Adds basic EthermintApp test to check future changes don't break build and export of Ethermint application without manually running

One thing I am not sure is necessary but it seems the case is exporting app state and validators checking for a zero height case:

	if forZeroHeight {
		app.prepForZeroHeightGenesis(ctx, jailWhiteList)
	}

I kept this, and prepForZeroHeightGenesis(...) in since there wasn't a way to specify which block to export the state at and that is the rationale for having this in.