Move installation steps to YAML filex

- move installation steps to YAML files
- add fixtures and snapshots for install salt, common services
  and openstack
- fixtures in conftest.py now are included by python instead of
  using pytest plugins
diff --git a/tcp_tests/managers/saltmanager.py b/tcp_tests/managers/saltmanager.py
new file mode 100644
index 0000000..2e539bc
--- /dev/null
+++ b/tcp_tests/managers/saltmanager.py
@@ -0,0 +1,35 @@
+#    Copyright 2016 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.
+
+class SaltManager(object):
+    """docstring for SaltManager"""
+
+    __config = None
+    __underlay = None
+
+    def __init__(self, config, underlay):
+        self.__config = config
+        self.__underlay = underlay
+
+
+        super(SaltManager, self).__init__()
+
+    def install(self, commands):
+        if self.__config.salt.salt_master_host == '0.0.0.0':
+            # Temporary workaround. Underlay should be extended with roles
+            salt_nodes = self.__underlay.node_names()
+            self.__config.salt.salt_master_host = \
+                self.__underlay.host_by_node_name(salt_nodes[0])
+
+        self.__underlay.execute_commands(commands)