Default DB connection

[vaclavn]

It would be nice if one defined connection was the default so all tests working with the first connection still work without any change.

I can imagine ugly solution to make the connection called primary always the default. Or adding a new parameter to make the connection default.

modules:
    config:
        MultiDb:
            connections:
                primary:
                    dsn: 'mysql:host=mysql;port=3306;dbname=test_db'
                    user: '...'
                    password: '...'
                    primary: true

I can prepare pull-request if you like the idea.

[iamdevice]

It's good idea

[ZoltanDobrovolni]

This merge caused a problem with config:
primary: true
reconnect: true
parameters don't like each other.

So i suggest that you can change Config example in the readme:
reconnect: false