ErrInvalidMsg shold not be used for invalid message which is not from the contract

[loloicci]

wasmd/x/wasm/types/tx.go

Line 223 in 881c77f

return sdkerrors.Wrap(ErrInvalidMsg, "new admin is the same as the old")

is not a suitble error type.

wasmd/x/wasm/types/errors.go

Line 37 in 0a1d457

// ErrInvalidMsg error when we cannot process the error returned from the contract

[loloicci]

This is fixed in CosmWasm#1311. Close this PR after merging this in our new version.