T6486: T6379: Rewrite generate openvpn client-config

This command helps to generate users .ovpn files
Rewrite generate openvpn client-config to use Config()
It needs to get the default values as ConfigTreeQuery is
not supporting default values.

Fixed "ignores configured protocol type" if TCP is used
Fixed lzo, was used even if lzo not configured
Fixed encryption is not parse the dict