initial delivery of system test framework

- add initial pytest framework with fixtures for
  vim, openstack, osm
- test cirros and ping_pong ns available from repo

Change-Id: Iae1fa4bcbf55fb8bc6986e798fd662a0bd452470
Signed-off-by: Mike Marchetti <mmarchetti@sandvine.com>
diff --git a/systest/.gitignore b/systest/.gitignore
new file mode 100644
index 0000000..97f7edd
--- /dev/null
+++ b/systest/.gitignore
@@ -0,0 +1,5 @@
+pytest-output.xml
+*.pyc
+.cache
+descriptor-packages/
+*.xml