Improve logging for slow queries

[ngudkov]

Hello!
When db4bix performs slow query (slower than connectionTimeoutMillis) the session will be terminated with result:
Query returned no data

Log example:

db4bix_1  | [2020/05/20 - 12:19:14] db4bix:TimerProcessor:warning DB: NAME Query returned no data Prod, 11183, 80000, 60, {"query":"select client_addr from pg_stat_replication","time":"60","item":"pgsql.DB4bix.config[streaming,NAME]","names":"HOTSTANDBY","status":"run"} connection properties: [

db4bix_1  |   [ 'type', 'postgres' ],
db4bix_1  |   [ 'instance', 'db_name' ],
db4bix_1  |   [ 'host', 'hostname' ],
db4bix_1  |   [ 'port', 'port' ],
db4bix_1  |   [ 'user', 'user' ],
db4bix_1  |   [
db4bix_1  |     'pool',
db4bix_1  |     {
db4bix_1  |       max: '10',
db4bix_1  |       min: '0',
db4bix_1  |       idleTimeoutMillis: '30000',
db4bix_1  |       connectionTimeoutMillis: '30000'
db4bix_1  |     }
db4bix_1  |   ],
db4bix_1  |   [ 'name', 'NAME' ]
db4bix_1  | ] query: {
db4bix_1  |   query: 'select client_addr from pg_stat_replication',
db4bix_1  |   time: '60',
db4bix_1  |   item: 'pgsql.DB4bix.config[streaming,NAME]',
db4bix_1  |   names: 'HOTSTANDBY',
db4bix_1  |   status: 'run'
db4bix_1  | } +0ms

I think that if the session was terminated by timeout, it should be logged clearly.
Example:
Query session was terminated before db NAME answered, connectionTimeoutMillis=[CURRENT_VALUE]