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/decision_engine/meta_action/migrate.py

@@ -0,0 +1,76 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2015 b<>com
+#
+# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.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 enum import Enum
+
+from watcher.decision_engine.meta_action.base import MetaAction
+
+
+class MigrationType(Enum):
+    # Total migration time and downtime depend on memory dirtying speed
+    pre_copy = 0
+    # Postcopy transfer a page only once reliability
+    post_copy = 1
+
+
+class Migrate(MetaAction):
+    def __init__(self, vm, source_hypervisor, dest_hypervisor):
+        MetaAction.__init__(self)
+        """Request Migrate
+        :param bandwidth the bandwidth reserved for the migration
+        :param vm:       the virtual machine to migrate
+        :param source_hypervisor:
+        :param dest_hypervisor:
+        :return:
+        """
+        self.bandwidth = 0
+        self.reservedDiskIOPS = 0
+        self.remainingDirtyPages = 0
+        self.vm = vm
+        self.migration_type = MigrationType.pre_copy
+        self.source_hypervisor = source_hypervisor
+        self.dest_hypervisor = dest_hypervisor
+
+    def set_migration_type(self, type):
+        self.migration_type = type
+
+    def set_bandwidth(self, bw):
+        """Set the bandwidth reserved for the migration
+
+        :param bw: bandwidth
+        """
+        self.bandwidth = bw
+
+    def get_bandwidth(self):
+        return self.bandwidth
+
+    def get_vm(self):
+        return self.vm
+
+    def get_source_hypervisor(self):
+        return self.source_hypervisor
+
+    def get_dest_hypervisor(self):
+        return self.dest_hypervisor
+
+    def __str__(self):
+        return "{0} Migrate {1} from {2} to {3}".format(
+            MetaAction.__str__(self), self.vm,
+            self.source_hypervisor,
+            self.dest_hypervisor)