ipatests.beakerlib_plugin: Add argument of generated tests to test captions

To differentiate between individual tests in BeakerLib output,
the argument needs to be added to the test name. Since Nose
doesn't provide a way to get the argument in a plugin,
a `test_argument` attribute must be added to the test function
to support this, simlarly to how `description` is used to set
individual "docstrings".

Add test_argument to the generated tests in the CA-less suite.

ipatests/beakerlib_plugin.py

@@ -233,7 +233,14 @@ class BeakerLibPlugin(Plugin):
         caption = test.shortDescription()
         if not caption:
             caption = 'Nose method (no docstring)'
-        phase_name = "%s: %s" % (test.id().replace('.', '-'), caption)
+        phase_name = test.id().replace('.', '-')
+        method = test
+        while hasattr(method, 'test'):
+            method = method.test
+        argument = getattr(method, 'test_argument', None)
+        if argument:
+            phase_name += '-%s' % re.sub('[^-a-zA-Z0-9]+', '_', str(argument))
+        phase_name += ": %s" % caption
         self.run_beakerlib_command(['rlPhaseStart', 'FAIL', phase_name])
 
         while hasattr(test, 'test'):

ipatests/test_integration/test_caless.py

@@ -1092,6 +1092,7 @@ class TestIPACommands(CALessBase):
                 'cert-status'):
             func = lambda: self.check_ipa_command_not_available(cmd)
             func.description = 'Verify that %s command is not available' % cmd
+            func.test_argument = cmd
             yield (func, )
 
     def test_cert_help_unavailable(self):