Revert "Support empty values in --config-option for tempest"
Revert "Support empty values in --config-option for tempest"


no need in this change --config-option <section>.<key>='""' is working for empty values

This reverts commit 45dd0c2ae45eb41aba5a7ae0d5985a42233e668b.

Change-Id: Ie20939eae7ff78fd972582cf3e987596bc71d334

redhat-openstack/infrared,okolisny/InfraRed,redhat-openstack/infrared,redhat-openstack/infrared,okolisny/InfraRed,okolisny/InfraRed