add stdin_open, tty support, add tests, fix #344

This adds supports for stdin_open: bool and
tty: bool support for kubernetes and openshift
providers in kompose. This maps to the
template.Spec.Containers[0].Stdin and
template.Spec.Containers[0].TTY in Kubernets
world.

Also, added tests.

Fixes #344

script/test/fixtures/tty-true/docker-compose.yml

@@ -0,0 +1,7 @@
+version: "2"
+services:
+  client:
+    image: registry.centos.org/centos/centos:7
+    ports:
+    - "1337"
+    tty: true