Update these scripts to explicitly call out python version 2. Some
distributions have started making /usr/bin/python version 3, and other
distros have expressed a desire to do the same.
Also use the
#!/usr/bin/env python2
construct instead of an explicit path so that the user can more easily
use their own python install by just placing it earlier in the path
Jira: ZEP-1548
Change-Id: I36dccc652353ba8bd58c483dba3ce61d3643de00
Signed-off-by: David Brown <david.brown@linaro.org>
