Create test chain with multiple validators (cosmos#942)

* testing: adding multiple sender accounts for testing puproses

* fix genesis setup (cosmos#936)

* Update testing/chain.go

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* refactor: code hygiene

* Update testing/chain.go

Co-authored-by: Aditya <adityasripal@gmail.com>

* multi validator commit taken from @Saione

* add function to pass custom valset

* add changelog

Co-authored-by: Sean King <sean@seking.dev>
Co-authored-by: Sean King <seantking@users.noreply.github.com>
Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

CHANGELOG.md

@@ -85,8 +85,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * [\#432](https://github.com/cosmos/ibc-go/pull/432) Introduce `MockIBCApp` struct to the mock module. Allows the mock module to be reused to perform custom logic on each IBC App interface function. This might be useful when testing out IBC applications written as middleware.
 * [\#380](https://github.com/cosmos/ibc-go/pull/380) Adding the Interchain Accounts module v1
 * [\#679](https://github.com/cosmos/ibc-go/pull/679) New CLI command `query ibc-transfer denom-hash <denom trace>` to get the denom hash for a denom trace; this might be useful for debug
-* (channel) [\#895](https://github.com/cosmos/ibc-go/pull/895) Adding UnpackAcknowledgement and PackAcknowledgement helper functions to pack or unpack an Acknowledgement to and from a proto Any type 
-
+* (channel) [\#895](https://github.com/cosmos/ibc-go/pull/895) Adding UnpackAcknowledgement and PackAcknowledgement helper functions to pack or unpack an Acknowledgement to and from a proto Any type
 
 ### Bug Fixes
 

testing/chain.go

@@ -86,6 +86,7 @@ type TestChain struct {
 // CONTRACT: Validator and signer array must be provided in the order expected by Tendermint.
 // i.e. sorted first by power and then lexicographically by address.
 func NewTestChainWithValSet(t *testing.T, coord *Coordinator, chainID string, valSet *tmtypes.ValidatorSet, signers []tmtypes.PrivValidator) *TestChain {
+
 	genAccs := []authtypes.GenesisAccount{}
 	genBals := []banktypes.Balance{}
 	senderAccs := []SenderAccount{}