wallet controller tests

[amandagonsalves]

always check and change the state if needed

• check if it is switching active account correctly

• check password using an encrypted password

• check if it is setting and encrypting correctly using SHA3

• check if it is importing mnemonic correctly after validation

• check logout

• check if it is deleting the wallet correctly

• check if it is returning lock correctly

• check if it is getting mnemonic correctly according to password