Adding OpenShift functional tests for kompose up/down

* This PR adds functional tests for kompose up/down. The test scripts
are hosted under script/test_in_openshift. The directory structure,
as follows:

	script/test_in_openshift/
	├── compose-files
	│   └── docker-compose-command.yml
	├── lib.sh
	├── run.sh
	└── tests
		├── buildconfig.sh
    		├── entrypoint-command.sh
    		├── etherpad.sh
    		└── redis-replica-2.sh

* script/test_in_openshift/run.sh is the master script
  which executes all the tests

* script/test_in_openshift/lib.sh consists of helper functions
  for `kompose up` and `kompose down` checks

* script/test_in_openshift/tests directory consists of test scripts

* The scripts use 'oc cluster up' for setting up a single-machine
  OpenShift cluster. It exits if oc binaries are not installed

* Most of the docker compose files used are the ones already
  available in examples/ or script/test/fixtures.

* How to run the tests: 'make test-openshift'

Makefile

@@ -55,6 +55,12 @@ test-unit-cover:
 	# generate go test commands using go list and run go test for every package separately 
 	go list -f '"go test -race -cover -v -coverprofile={{.Dir}}/.coverprofile {{.ImportPath}}"' github.com/kubernetes-incubator/kompose/...  | grep -v "vendor" | xargs -L 1 -P4 sh -c 
 
+
+# run openshift up/down tests
+.PHONY: test-openshift
+test-openshift:
+	./script/test_in_openshift/run.sh
+
 # run commandline tests
 .PHONY: test-cmd
 test-cmd:
@@ -89,7 +95,7 @@ test: check-vendor validate test-unit-cover install test-cmd
 .PHONY: test-image
 test-image:
 	docker build -t $(TEST_IMAGE) -f script/test_in_container/Dockerfile script/test_in_container/
-	
+
 # run all test localy in docker image (image can be build by by build-test-image target)
 .PHONY: test-container
 test-container: