Bug 1390699 - Follow-up: Use find_executable() to locate echo. r=ahal

MozReview-Commit-ID: QY8dajeXs0

python/mozlint/test/test_cli.py

@@ -4,8 +4,8 @@
 
 import os
 import sys
+from distutils.spawn import find_executable
 
-import py
 import pytest
 
 from mozlint import cli
@@ -39,7 +39,7 @@ def test_cli_run_with_fix(run, capfd):
     assert out.endswith('{}\n')
 
 
-@pytest.mark.skipif(not py.path.local.sysfind("echo"), reason="No `echo` executable found.")
+@pytest.mark.skipif(not find_executable("echo"), reason="No `echo` executable found.")
 def test_cli_run_with_edit(run, parser, capfd):
     os.environ['EDITOR'] = 'echo'