Split commands properly for bash completion test.

The bash completion test was trying to loop over some options in order
to test that they appeared in the output.  This splits the list so that
proper looping occurs.  This helps protect against test failures when
new options are added and the bash completion output changes order.

Change-Id: I81517038953fb429e8d98b762c77749bbbc0e8d7

tests/test_shell.py

@@ -102,7 +102,12 @@ class ShellTest(utils.TestCase):
     def test_bash_completion(self):
         stdout, stderr = self.shell('bash-completion')
         # just check we have some output
-        required = ['--matching --wrap help secgroup-delete-rule --priority']
+        required = [
+            '.*--matching',
+            '.*--wrap',
+            '.*help',
+            '.*secgroup-delete-rule',
+            '.*--priority']
         for r in required:
             self.assertThat((stdout + stderr),
                             matchers.MatchesRegex(r, re.DOTALL | re.MULTILINE))