Move volume manager specific handlers into extensions directory

Implements blueprint: volume-manager-refactoring

Change-Id: I3a627f5625a0589252ff903aaa9930163bfc255c

docs/develop/nailgun/development/api_doc.rst

@@ -28,7 +28,7 @@ Nodes API
 Disks API
 ---------
 
-.. automodule:: nailgun.api.v1.handlers.disks
+.. automodule:: nailgun.extensions.volume_manager.handlers.disks
 	:inherited-members:
 
 

nailgun/nailgun/api/v1/urls.py

@@ -35,9 +35,14 @@ from nailgun.api.v1.handlers.cluster import ClusterUpdateHandler
 from nailgun.api.v1.handlers.cluster import VmwareAttributesDefaultsHandler
 from nailgun.api.v1.handlers.cluster import VmwareAttributesHandler
 
-from nailgun.api.v1.handlers.disks import NodeDefaultsDisksHandler
-from nailgun.api.v1.handlers.disks import NodeDisksHandler
-from nailgun.api.v1.handlers.disks import NodeVolumesInformationHandler
+# TODO(eli): should be moved into separate extension, as a part of blueprint:
+# https://blueprints.launchpad.net/fuel/+spec/volume-manager-refactoring
+from nailgun.extensions.volume_manager.handlers.disks \
+    import NodeDefaultsDisksHandler
+from nailgun.extensions.volume_manager.handlers.disks \
+    import NodeDisksHandler
+from nailgun.extensions.volume_manager.handlers.disks \
+    import NodeVolumesInformationHandler
 
 from nailgun.api.v1.handlers.logs import LogEntryCollectionHandler
 from nailgun.api.v1.handlers.logs import LogPackageDefaultConfig

nailgun/nailgun/test/integration/test_api_doc_generation.py

@@ -54,8 +54,17 @@ class TestAPIDocGeneration(BaseIntegrationTest):
 
     def test_url_generator(self):
         path = os.path.dirname(os.path.realpath(__file__))
-        path = ('/'.join(path.split('/')[:-2])) + "/api/v1/handlers/"
-        classes = self.load_from_path(path)
+        handlers_path = ('/'.join(path.split('/')[:-2])) + "/api/v1/handlers/"
+        classes = self.load_from_path(handlers_path)
+
+        # TODO(eli): Remove this hack when urls definition will be moved
+        # into extensions directory, should be done as a part of blueprint
+        # https://blueprints.launchpad.net/fuel/+spec
+        #                                 /volume-manager-refactoring
+        extensions_path = ('/'.join(path.split('/')[:-2])) + \
+            '/extensions/volume_manager/handlers/'
+        classes.extend(self.load_from_path(extensions_path))
+
         names = set()
         unique_classes = []
         urls_ = []