This commit fixes issue with having a multiple contract addresses for the same symbols at the same networks.
An issue we had with this was that when we're searching for a token by symbol, always the first one from the
list was returned. That thing may result later in not having enough balance for that token on certain network,
even the user actually has it.
Fixed some other issues with prevented startup of statusd:
- ensure paths for DBs are created
- ensure DBs are opened before calling `StartNode`
- ignore error if multiacc database is not available
Updates #14693
interface for initializing db, which is implemented for appdatabase and
walletdatabase. TBD for multiaccounts DB.
Unified DB initializion for all tests using helpers and new interface.
Reduced sqlcipher kdf iterations for all tests to 1.
