Simulation test: high failure rates for some operations for some flag values

[lumtis]

Describe the bug
When setting the FlagNumBlocksValue and FlagBlockSizeValue to different values in app/simulation_test.go. Some operations might sometimes have very high failure rates. Example are:

update_total_shares
update_total_supply
request_remove_account
request_remove_validator

I think changing the flag values modify the seed used for the simulation and therefore the state of the app will be different. The high failure rates might be related to flaws in our methods to fetch the state (FindChain, FindCampaign) that fails to find values for specific configurations of the state of the app.
We must investigate this

[lumtis]

Based on the operation I listed above. The flawed methods might be GetCoordSimAccountWithCampaignID and FindRandomRequest

[lumtis]

Closing in favor of #716