update test: dont return command output by default

Signed-off-by: Steven Armstrong <steven@icarus.ethz.ch>

lib/cdist/test/exec/remote.py

@@ -92,7 +92,7 @@ class RemoteTestCase(unittest.TestCase):
         fd = open(script, "w")
         fd.writelines(["#!/bin/sh\n", "echo foobar"])
         fd.close()
-        self.assertEqual(self.remote.run_script(script), "foobar\n")
+        self.assertEqual(self.remote.run_script(script, return_output=True), "foobar\n")
 
     def test_mkdir(self):
         temp_dir = self.mkdtemp(dir=self.temp_dir)