s390x iscsi support enablement
s390x iscsi support enablement

s390x supports a number of storage technologies that were, up to now, not
included in the initiator list. This fix addresses this issues by simply
adding all initiators that are known to work.

Change-Id: I7208a34f1924146757401af14e765d2ef294dbea
Closes-bug: #1626991

openstack/os-brick,openstack/os-brick