CA-346583: make set-iscsi-initiator idempotent
CA-346583: make set-iscsi-initiator idempotent

Signed-off-by: Mark Syms <655512b2a8f1aba6e4085462b623575da824f038@citrix.com>

xapi-project/sm,xapi-project/sm,xapi-project/sm