Code refactoring - Watcher Decision Engine package

This patchset is there to change the code structure.
The objective is to flatten the project file tree by merging
'api/' and 'framework/' into a single package. This also contains
some tidy ups in package naming (like using only singular nouns).

This should only affect file/folder names and their subsequent
import paths wherever they were used.

Change-Id: Ie903ba20ca5cf03b0b42efa60131d1b919b0c2c9

watcher/tests/decision_engine/strategy/test_strategy_loader.py

@@ -0,0 +1,37 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2015 b<>com
+#
+# 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.
+from watcher.decision_engine.strategy.base import BaseStrategy
+from watcher.decision_engine.strategy.loader import StrategyLoader
+from watcher.tests import base
+
+
+class TestStrategySelector(base.BaseTestCase):
+
+    strategy_loader = StrategyLoader()
+
+    def test_load_strategy_with_empty_model(self):
+        selected_strategy = self.strategy_loader.load(None)
+        self.assertIsNotNone(selected_strategy,
+                             'The default strategy be must not none')
+        self.assertIsInstance(selected_strategy, BaseStrategy)
+
+    def test_load_strategy_is_basic(self):
+        exptected_strategy = 'basic'
+        selected_strategy = self.strategy_loader.load(exptected_strategy)
+        self.assertEqual(
+            selected_strategy.name,
+            exptected_strategy,
+            'The default strategy should be basic')