Using get() to access keys like "summary.guest.toolsStatus" and
"summary.guest.toolrunningStatus" to avoid exception during hard reboot.
This change would use a default values even if they don't exist in dict
as we can have VMs where VM tools wouldn't be installed/running which leads
to hard reboot
Change-Id: I332867fe783d6d47b81d8a53153af140d4158217
Closes-bug: #1563325
(cherry picked from commit d3c7396d87)