Fix tempest.conf generation

[service_available] is not being generated. This patch fixes it.

Change-Id: I364621ce96a1d2f6bc49df6f2868b093f719a6f5
Closes-Bug: #1613542

ironic_inspector/test/inspector_tempest_plugin/config.py

@@ -14,6 +14,15 @@ from oslo_config import cfg
 
 from tempest import config  # noqa
 
+service_available_group = cfg.OptGroup(name="service_available",
+                                       title="Available OpenStack Services")
+
+ServiceAvailableGroup = [
+    cfg.BoolOpt("ironic-inspector",
+                default=True,
+                help="Whether or not ironic-inspector is expected to be"
+                " available"),
+]
 
 baremetal_introspection_group = cfg.OptGroup(
     name="baremetal_introspection",

ironic_inspector/test/inspector_tempest_plugin/plugin.py

@@ -28,10 +28,16 @@ class InspectorTempestPlugin(plugins.TempestPlugin):
         return full_test_dir, base_path
 
     def register_opts(self, conf):
+        tempest_config.register_opt_group(
+            conf, config.service_available_group,
+            config.ServiceAvailableGroup)
         tempest_config.register_opt_group(
             conf, config.baremetal_introspection_group,
             config.BaremetalIntrospectionGroup)
 
     def get_opt_lists(self):
-        return [(config.baremetal_introspection_group.name,
-                 config.BaremetalIntrospectionGroup)]
+        return [
+            (config.baremetal_introspection_group.name,
+             config.BaremetalIntrospectionGroup),
+            ('service_available', config.ServiceAvailableGroup)
+        ]