Remake AccountInfo struct

[kastolars]

• accountinfo.go

• Add a WalletAddress string field to AccountInfo

• New should take a first parameter walletAddress string and add it into the &AccountInfo{} return statement.

• Serialize should call hex.DecodeString on accInfo.WalletAddress and prepend it to the converted Balance bytes

• Deserialize should call hex.EncodeToString on the portion of the byte array that is the wallet address

• accountinfo_test.go

• Make all tests pass with new changes

• producer_test.go

• Remove the TestResponseToAccoutnInfoRequest test completely

• accountstable.go

• Modify GetAccountInfo to first convert the the pkhash parameter to a string using hex.EncodeToString, then correct the return statement with the missing field

• accountstable_test.go

• Correct the TestAccountInfo test to make it pass now

• handlers.go

• In HandleAccountInfoRequest, remove the AccountInfo struct definition

• In the same function, refactor var accInfo AccountInfo to use accountinfo.AccountInfo instead

• This correct may need to made after the if ok { branch

handlers_test.go

• Make sure tests are passing

Guidance:

• Remember you can always run go test -v ./... at project root to run all tests and see what's failing
• https://golang.org/pkg/encoding/hex/#DecodeString
• https://golang.org/pkg/encoding/hex/#EncodeToString