Write simulations for evidence module

[fedekunze]

Summary

x/evidence module is missing the simulation/ package required to run simulations for the module

Problem Definition

Simulations are not running evidence module operations.

Proposal

1. Write the following simulation functions for evidence module and register them in x/evidence/module.go:

• Randomized genesis state
• Store decoders
• Weighted operations

2. Add x/evidence simulations to SDK Simapp
3. Add x/evidence simulations to Gaia

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[alexanderbez]

There is nothing to simulate atm. Clients cannot arbitrarily submit any evidence they like. You'll see the following in simapp:

	// create evidence keeper with router
	evidenceKeeper := evidence.NewKeeper(
		appCodec, keys[evidence.StoreKey], app.subspaces[evidence.ModuleName], &app.StakingKeeper, app.SlashingKeeper,
	)
	evidenceRouter := evidence.NewRouter()
	// TODO: Register evidence routes.
	evidenceKeeper.SetRouter(evidenceRouter)
	app.EvidenceKeeper = *evidenceKeeper

[fedekunze]

There is nothing to simulate atm. Clients cannot arbitrarily submit any evidence they like.

👍I'll remove the weighted operations then