Ubuntu Jammy installs the named-checkzone tool to
/usr/bin/named-checkzone, but old ubuntu installed to
/usr/sbin/named-checkzone. Rather than try and keep track of the
different locations we update the task to run under the shell module so
that we can rely on $PATH to do the heavy lifting for us.
To help ensure this doesn't break the old path and to catch problems
earlier I have also added testing across the debuntu set of platforms.
The role doesn't currently support other platforms as it relies on the
bind9utils package.
Change-Id: I1650b605cb6f25fa7585524b427d65d2fc291338
5f3c90057c