Bug in financeChangeAddress when send asset amount back and forth.

[veyhong]

To reproduce the bug:

• Set financeChangeAddress: cc.hdwallet.getAddress(0, 0)
• Send asset from and address A to B
• Send asset back from B to A

After sent back and forth, the output amount (Funding amount in tBTC) will automatically go to address A in testnet even thought we set (financeChangeAddress to cc.hdwallet.getAddress(0, 0))

Note:

• cc.hdwallet.getAddress(0, 0) is funded
• Address A and B hold dust amount of tBTC only.