feat: add bankplus function to restrict to send coin to inactive smart contract.

[zemyblue]

Description

If the receiver is inactive contract, the transfer is failure.
This function doesn't modify bank module. The SendCoins of bank module is wrapped in the bankplus. But the bankplus is not other module. It just extends the bank module.

Wrapping the SendCoins of bank module

If specific smart contract change to inactive status, wasm call the AddBlockedAddr of bankplus. And conversely, if change active, wasm call the DeleteBlockedAddr of bankplus.

All bank module should be change to bankplus when initiate the app.
(So, lbm should apply this as well.)

Add blockedAddr for blocked smart contract.

The blockedAddr of original bank module and blockedAddr of bankplus is different.

• The blockedAddr of original bank module is just generated when the app initiate, and manage the list of blocked modules, and it cannot be changed.
• The blockedAddr of bankplus manage inactive smart contracts, and can add/delete when the smart contract's status is changed.

closes: #394

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[codecov]

Codecov Report

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[brew0722]

In genernal, LGTM

[brew0722]

LGTM

[loloicci]

LGTM