Fix test by adding one ip adress in grains

Change-Id: I0f2d549859c91cf32949a961dfe033a74f51ce42
diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index 29fb975..c2f7f77 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -139,6 +139,7 @@
 }
 
 run() {
+    salt_run grains.append 'ipv4' '0.0.0.0'
     for pillar in ${PILLARDIR}/*.sls; do
         grep ${FORMULA_NAME}: ${pillar} &>/dev/null || continue
         state_name=$(basename ${pillar%.sls})