Improve pdo_sqlite using info
minor #711 Improve pdo_sqlite using info (aivus)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #711).

Discussion
----------

Improve pdo_sqlite using info

1. Line with `path` declaration should be uncommented in config.yml for use `database_path`
2. Line with `database_path` declaration should be uncommented in parameters.yml.dist, because any composer commands (which call `post-install-cmd` or `post-update-cmd`) remove `database_path` from parameters.yml

Commits
-------

f1aa7f8 Improve pdo_sqlite using info
Merge branch '2.3' into 2.4

* 2.3:
  Improve pdo_sqlite using info
Merge branch '2.4' into 2.5

* 2.4:
  Improve pdo_sqlite using info