sanitycheck: use Python 3

Python 2 isn't supported anymore and doesn't get fixes/updates.
For the long-term maintenance health of sanitycheck, convert to
use Python 3 interpreter, which mostly involved changes to how
strings are handled.

Change-Id: Ic42f5b2328001f04d876fd650986c4433968a76b
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
1 file changed