use controller module address instead of module name for NewMsgChanne…

…lOpenInit (cosmos#2568)

## Description

In controller keeper's `registerInterchainAccount` we execute a `MsgChannelOpenInit` to set up an ica channel. Currently, we have [`icatypes.ModuleName`](https://github.com/cosmos/ibc-go/blob/95cec44c9fb10a2e84a327cdd98c7d588f091f42/modules/apps/27-interchain-accounts/controller/keeper/account.go#L63) as the msg signer. This is not good because the [`ValidateBasic()`](https://github.com/cosmos/ibc-go/blob/692790402a033c1d9647c1e1eded5351332283bf/modules/core/04-channel/types/msgs.go#L34) of `MsgChannelOpenInit` has check if msg signer is bech32 or not.

ref cosmos#2566

closes: cosmos#2559

---

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- [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/building-modules/10-structure.md).
- [ ] Wrote unit and integration [tests](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#testing)
- [ ] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [ ] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [ ] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
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- [ ] Review `Codecov Report` in the comment section below once CI passes

modules/apps/27-interchain-accounts/controller/keeper/account.go

@@ -3,6 +3,7 @@ package keeper
 import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
+	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
 
 	icatypes "github.com/cosmos/ibc-go/v6/modules/apps/27-interchain-accounts/types"
 	channeltypes "github.com/cosmos/ibc-go/v6/modules/core/04-channel/types"
@@ -60,7 +61,7 @@ func (k Keeper) registerInterchainAccount(ctx sdk.Context, connectionID, portID,
 		}
 	}
 
-	msg := channeltypes.NewMsgChannelOpenInit(portID, version, channeltypes.ORDERED, []string{connectionID}, icatypes.HostPortID, icatypes.ModuleName)
+	msg := channeltypes.NewMsgChannelOpenInit(portID, version, channeltypes.ORDERED, []string{connectionID}, icatypes.HostPortID, authtypes.NewModuleAddress(icatypes.ModuleName).String())
 	handler := k.msgRouter.Handler(msg)
 	res, err := handler(ctx, msg)
 	if err != nil {