Db Factory

[Jurigag]

https://github.com/phalcon/incubator/blob/master/Library/Phalcon/Db/Adapter/Factory.php

This class could be removed for 3.2.x since it will be built-in in phalcon 3.2.0 though in diffrent namespace - Phalcon\Db\Adapter\Pdo\Factory so maybe just change this class to call phalcon built-in factory and deprecate this one?

[sergeysviridenko]

@Jurigag I propose to remove this class for 4.0.x branch. Also I propose to remove deprecated classes and to keep useful classes for php 7.0 or higher?