iscsilib: Fix get_current_initiator_name to ignore InitiatorName in comments

On Debian, the /etc/iscsi/initiatorname.iscsi has comments telling you
what to do with the InitiatorName parameter;  the previous code would try
to interpret this comment as the InitiatorName setting and fail to parse it.

Signed-off-by: Euan Harris <euan.harris@citrix.com>
scsiutil: Set path to find scsi_id on Ubuntu

Signed-off-by: Euan Harris <euan.harris@citrix.com>