test: unset log_* in configurations

This is necessary, as otherwise ocid will use its own current directory
as a log_directory, which is not the best idea in the world. The same
applies for log_path.

Signed-off-by: Aleksa Sarai <asarai@suse.de>

test/testdata/container_config.json

@@ -41,7 +41,7 @@
 	},
 	"privileged": true,
 	"readonly_rootfs": true,
-	"log_path": "container.log",
+	"log_path": "",
 	"stdin": false,
 	"stdin_once": false,
 	"tty": false,

test/testdata/sandbox_config.json

@@ -6,7 +6,7 @@
 		"attempt": 1
 	},
 	"hostname": "ocic_host",
-	"log_directory": ".",
+	"log_directory": "",
 	"dns_options": {
 		"servers": [
 			"server1.redhat.com",