Remove duplicate config section from block-storage.yaml
Remove duplicate config section from block-storage.yaml

Deletes a duplicate config section from file block-storage.yaml
(and a duplicate admin-password key too).

Change-Id: I226517ea467751d00dbf217a6b6e4e0839538225

trozet/opnfv-tht,redhat-openstack/tripleo-heat-templates,wyg3958/tripleo-heat-templates,wyg3958/tripleo-heat-templates,openstack/tripleo-heat-templates,trozet/opnfv-tht,trozet/tripleo-heat-templates,trozet/opnfv-tht,rdo-management/tripleo-heat-templates,bcrochet/tripleo-heat-templates,bcrochet/tripleo-heat-templates,rdo-management/tripleo-heat-templates,bcrochet/tripleo-heat-templates,dprince/tripleo-heat-templates,trozet/tripleo-heat-templates,dprince/tripleo-heat-templates,redhat-openstack/tripleo-heat-templates,openstack/tripleo-heat-templates