BDD: add SetupWizard tests for Demo with and without content
BDD: add coverage for each package and their version
BDD: remove socket from DB step (to work on pgsql also)
BDD: change database credentials to 'ezp' with 'ezp'
Merge pull request #783 from cleverti/bdd_setupwizard_for_demo

BDD: add SetupWizard tests for Demo with and without content