fixup! fixup! manager/tests: simple test for /cache-clear API endpoint

Author: alesmrazek

manager/tests/packaging/interactive/cache-clear.sh

@@ -8,7 +8,7 @@ if [ "$?" -ne "0" ]; then
 fi
 
 # clear just example.com. AAAA record, get JSON output
-kresctl cache clear --json --exact-name --rr-type AAAA example.com. | python -m json.tool
+kresctl cache clear --json --exact-name --rr-type AAAA example.com. | python3 -m json.tool
 if [ "$?" -ne "0" ]; then
 	echo "Could not clear example.com. AAAA record or output is not a valid JSON"
 	exit 1