Add script for the launching nightly job with HappyPath scenario (#15935)

* add script for the che happy path nigtly job

tests/.infra/centos-ci/nightly/nightly-happypath-test.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+# Copyright (c) 2018 Red Hat, Inc.
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Eclipse Public License v1.0
+# which accompanies this distribution, and is available at
+# http://www.eclipse.org/legal/epl-v10.html
+set -e
+
+echo "========Starting nigtly test job $(date)========"
+
+source tests/.infra/centos-ci/functional_tests_utils.sh
+source .ci/cico_common.sh
+
+installKVM
+installDependencies
+installCheCtl
+installAndStartMinishift
+loginToOpenshiftAndSetDevRole
+deployCheIntoCluster
+createTestUserAndObtainUserToken
+createTestWorkspaceAndRunTest
+archiveArtifacts "che-nightly-happy-path"
+