9058 postmortem DTrace frequently broken under vmware

illumos/illumos-gate@793bd7e3617ae7d3d24e8c6b7d6befe35f07ec1f

Reviewed by: Tim Kordas <tim.kordas@joyent.com>
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>
Reviewed by: Yuri Pankov <yuripv@yuripv.net>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Matthew Ahrens <mahrens@delphix.com>
Author: Sam Gwydir <sam.gwydir@joyent.com>