Makefile.am: Revert to old serial test harness

Running the different testsuites in parallel is dangerous since despite
running in different netns, legacy iptables still synchronizes via the
common XTABLES_LOCKFILE.

Fixes: e1eaa04e31e44 ("Makefile.am: Integrate testsuites")
Signed-off-by: Phil Sutter <[email protected]>
1 file changed