test: relay tests for TrySendTx/OnRecvPacket (#531)

* adding various sdk.Msg type tests and cleaning up relay_test.go

* cleaning up tests to make consistent

* adding missing godoc for OnRecvPacket

* adding ica test for transfertypes.MsgTranfer

* updating hardcoded strings to use sdk.DefaultBondDenom

* Update modules/apps/27-interchain-accounts/keeper/relay_test.go

Co-authored-by: Sean King <seantking@users.noreply.github.com>

* removing staking test for insufficient funds

Co-authored-by: Sean King <seantking@users.noreply.github.com>

Author: damiannolan

modules/apps/27-interchain-accounts/keeper/relay.go

@@ -125,6 +125,7 @@ func (k Keeper) executeMsg(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
 	return handler(ctx, msg)
 }
 
+// OnRecvPacket handles a given interchain accounts packet on a destination host chain
 func (k Keeper) OnRecvPacket(ctx sdk.Context, packet channeltypes.Packet) error {
 	var data types.InterchainAccountPacketData