Test placeholder for dispersion_report module

This module was recently moved from bin/ and the execute bit stuck
around and wasn't imported by our test suite - which throws off
accountability in coverage reporting.

Remove the execute bit and add a placeholder unittest module.

Related-Change-Id: Ie0d52a1a54fc152bb72cbb3f84dcc36a8dad972a
Change-Id: Id9e678c2460cc889f682c5566a4418160db7878f

test/unit/cli/test_dispersion_report.py

@@ -0,0 +1,21 @@
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy
+# of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import unittest
+
+from swift.cli import dispersion_report
+
+
+class TestDispersionReport(unittest.TestCase):
+
+    def test_placeholder(self):
+        self.assertTrue(callable(dispersion_report.main))