Remove unit tests that test oslo_concurrency.processutils.execute

Remove the unit tests that were testing the functionality of
oslo_concurrency.processutils.execute. It is not our job to unit test
3rd party libraries.

Change-Id: I6a55f572e2e0c648326006c394ea909649a8e72c

ironic/tests/unit/common/test_utils.py

@@ -52,97 +52,6 @@ class BareMetalUtilsTestCase(base.TestCase):
 
 class ExecuteTestCase(base.TestCase):
 
-    def test_retry_on_failure(self):
-        fd, tmpfilename = tempfile.mkstemp()
-        _, tmpfilename2 = tempfile.mkstemp()
-        try:
-            with os.fdopen(fd, 'w+') as fp:
-                fp.write('''#!/bin/sh
-# If stdin fails to get passed during one of the runs, make a note.
-if ! grep -q foo
-then
-    echo 'failure' > "$1"
-fi
-# If stdin has failed to get passed during this or a previous run, exit early.
-if grep failure "$1"
-then
-    exit 1
-fi
-runs="$(cat $1)"
-if [ -z "$runs" ]
-then
-    runs=0
-fi
-runs=$(($runs + 1))
-echo $runs > "$1"
-exit 1
-''')
-            os.chmod(tmpfilename, 0o755)
-            try:
-                self.assertRaises(processutils.ProcessExecutionError,
-                                  utils.execute,
-                                  tmpfilename, tmpfilename2, attempts=10,
-                                  process_input=b'foo',
-                                  delay_on_retry=False)
-            except OSError as e:
-                if e.errno == errno.EACCES:
-                    self.skipTest("Permissions error detected. "
-                                  "Are you running with a noexec /tmp?")
-                else:
-                    raise
-            with open(tmpfilename2, 'r') as fp:
-                runs = fp.read()
-            self.assertNotEqual(runs.strip(), 'failure', 'stdin did not '
-                                'always get passed '
-                                'correctly')
-            runs = int(runs.strip())
-            self.assertEqual(10, runs,
-                             'Ran %d times instead of 10.' % (runs,))
-        finally:
-            os.unlink(tmpfilename)
-            os.unlink(tmpfilename2)
-
-    def test_unknown_kwargs_raises_error(self):
-        self.assertRaises(processutils.UnknownArgumentError,
-                          utils.execute,
-                          '/usr/bin/env', 'true',
-                          this_is_not_a_valid_kwarg=True)
-
-    def test_check_exit_code_boolean(self):
-        utils.execute('/usr/bin/env', 'false', check_exit_code=False)
-        self.assertRaises(processutils.ProcessExecutionError,
-                          utils.execute,
-                          '/usr/bin/env', 'false', check_exit_code=True)
-
-    def test_no_retry_on_success(self):
-        fd, tmpfilename = tempfile.mkstemp()
-        _, tmpfilename2 = tempfile.mkstemp()
-        try:
-            with os.fdopen(fd, 'w+') as fp:
-                fp.write('''#!/bin/sh
-# If we've already run, bail out.
-grep -q foo "$1" && exit 1
-# Mark that we've run before.
-echo foo > "$1"
-# Check that stdin gets passed correctly.
-grep foo
-''')
-            os.chmod(tmpfilename, 0o755)
-            try:
-                utils.execute(tmpfilename,
-                              tmpfilename2,
-                              process_input=b'foo',
-                              attempts=2)
-            except OSError as e:
-                if e.errno == errno.EACCES:
-                    self.skipTest("Permissions error detected. "
-                                  "Are you running with a noexec /tmp?")
-                else:
-                    raise
-        finally:
-            os.unlink(tmpfilename)
-            os.unlink(tmpfilename2)
-
     @mock.patch.object(processutils, 'execute', autospec=True)
     @mock.patch.object(os.environ, 'copy', return_value={}, autospec=True)
     def test_execute_use_standard_locale_no_env_variables(self, env_mock,