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
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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
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f1aa7f8 Improve pdo_sqlite using info