Initial commit with fixtures

- add fixtures for hardware and underlay
- add fuel-devops template tcpcloud-default.yaml

* Migration of fixtures is not finished yet
diff --git a/tcp_tests/conftest.py b/tcp_tests/conftest.py
new file mode 100644
index 0000000..3dff580
--- /dev/null
+++ b/tcp_tests/conftest.py
@@ -0,0 +1,3 @@
+# DO NOT EDIT THIS FILE!
+# To include new fixtures, please use conftest.py files
+# located in the appropriate ./tests/* folders.