fix Undefined index: websiteId error on very first install step
Revert "fix Undefined index: websiteId error on very first install step"

This reverts commit c22b6d9144ebcf2a31ca46e818d2424ae4c7c3c9.
fix Undefined index: websiteId error on very first install step, session
not started
Merge pull request #508 from fabvla/master

Fix Undefined index: websiteId on 1 step installation