fix a minor typo in storage section

Opject → Object

Change-Id: I4fc45589fe18e1faca579e722de88a74d0276936
Document LIO iSCSI support

LIO iSCSI support was added in Grizzly. This patch adds a small section to the
block storage section of the admin guide explaining how to turn it on and
which deps/tools to use.

Change-Id: I39767e682b1f4ca005fa272544cdd37fc0a998bd
Closes-Bug: 1111084
Merge "fix a minor typo in storage section"