Add virtlet deploy step

Added fixture, manager and step for deploy virtlet.
Added test for deploy virtlet.

Change-Id: I63a2c4dcd95ba78af60b610a9ae621a784d87fd8
Reviewed-on: https://review.gerrithub.io/362146
Reviewed-by: Sergii Golovatiuk <holser@gmail.com>
Reviewed-by: Tatyanka Leontovich <tleontovich@mirantis.com>
Reviewed-by: Dennis Dmitriev <dis.xcom@gmail.com>
Tested-by: Dennis Dmitriev <dis.xcom@gmail.com>
diff --git a/tcp_tests/fixtures/virtlet_fixtures.py b/tcp_tests/fixtures/virtlet_fixtures.py
new file mode 100644
index 0000000..f70a201
--- /dev/null
+++ b/tcp_tests/fixtures/virtlet_fixtures.py
@@ -0,0 +1,84 @@
+#    Copyright 2017 Mirantis, Inc.
+#
+#    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.
+
+import os
+
+import pytest
+import yaml
+
+from tcp_tests import logger
+from tcp_tests.helpers import ext
+from tcp_tests import settings
+from tcp_tests.managers import virtlet_manager
+
+LOG = logger.logger
+
+
+@pytest.fixture(scope='function')
+def virtlet_actions(config, underlay, salt_actions):
+    """Fixture that provides various actions for Virtlet project
+
+    :param config: fixture provides oslo.config
+    :param underlay: fixture provides underlay manager
+    :rtype: VirtletManager
+    """
+    return virtlet_manager.VirtletManager(config, underlay, salt_actions)
+
+
+@pytest.mark.revert_snapshot(ext.SNAPSHOT.virtlet_deployed)
+@pytest.fixture(scope='function')
+def virtlet_deployed(revert_snapshot, request, config,
+                             hardware, underlay, common_services_deployed,
+                             virtlet_actions):
+    """Fixture to get or install Virtlet project on the environment
+
+    :param revert_snapshot: fixture that reverts snapshot that is specified
+                            in test with @pytest.mark.revert_snapshot(<name>)
+    :param request: fixture provides pytest data
+    :param config: fixture provides oslo.config
+    :param hardware: fixture provides enviromnet manager
+    :param underlay: fixture provides underlay manager
+    :param virtlet_actions: fixture provides VirtletManager instance
+    :rtype: VirtletManager
+
+    If config.virtlet.virtlet_installed is not set, this
+    fixture assumes that the Virtlet project was not installed,
+    and do the following:
+    - install Virtlet project
+    - make snapshot with name 'virtlet_deployed'
+    - return VirtletManager
+
+    If config.virtlet.virtlet_installed was set, this fixture assumes that
+    the Virtlet project was already installed, and do the following:
+    - return VirtletManager instance
+
+    If you want to revert 'virtlet_deployed' snapshot, please use mark:
+    @pytest.mark.revert_snapshot("virtlet_deployed")
+    """
+    # Create Salt cluster
+    if not config.virtlet.virtlet_installed:
+        steps_path = config.virtlet_deploy.virtlet_steps_path
+        commands = underlay.read_template(steps_path)
+        virtlet_actions.install(commands)
+        hardware.create_snapshot(ext.SNAPSHOT.virtlet_deployed)
+
+    else:
+        # 1. hardware environment created and powered on
+        # 2. config.underlay.ssh contains SSH access to provisioned nodes
+        #    (can be passed from external config with TESTS_CONFIGS variable)
+        # 3. config.tcp.* options contain access credentials to the already
+        #    installed TCP API endpoint
+        pass
+
+    return virtlet_actions