Rename main.yml playbooks to pre-deployment.yml

Scenarios currently have main.yml playbooks that contain
tasks to run pre-deployment of the platform. This change makes
it possible to rename main.yml playbooks in scenario roles
to pre-deployment.yml so it becomes more visible that the
tasks in pre-deployment.yml playbook are run before the actual
deployment.

A related change is sent to all the scenarios to rename
main.yml playbooks to pre-deployment.yml.
  https://gerrit.nordix.org/#/c/1660/

Change-Id: Ie9f984e67ce8f6f0dc5c8a60e0f3984cb84cca75
diff --git a/playbooks/pre-deployment.yml b/playbooks/pre-deployment.yml
new file mode 100644
index 0000000..a7c3e07
--- /dev/null
+++ b/playbooks/pre-deployment.yml
@@ -0,0 +1,52 @@
+---
+# ============LICENSE_START=======================================================
+#  Copyright (C) 2019 The Nordix Foundation. All rights reserved.
+# ================================================================================
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+# ============LICENSE_END=========================================================
+
+# check if pre-deployment.yml exists in engine cache on localhost
+- hosts: localhost
+  connection: local
+  gather_facts: false
+  become: yes
+  vars_files:
+    - "{{ engine_path }}/engine/var/versions.yml"
+    - "{{ engine_path }}/engine/var/global.yml"
+    - "{{ sdf_file }}"
+
+  tasks:
+    - name: Check if any pre-deployment task defined for '{{ deploy_scenario }}' role
+      stat:
+        path: "{{ engine_cache }}/repos/swconfig/{{ scenario[deploy_scenario].installers[installer_type].role }}/tasks/pre-deployment.yml"
+      register: pre_deployment_yml
+
+# run the scenario pre-deployment tasks before running the deployment itself
+- hosts: localhost
+  connection: local
+  gather_facts: false
+  vars_files:
+    - "{{ engine_path }}/engine/var/versions.yml"
+    - "{{ engine_path }}/engine/var/global.yml"
+    - "{{ sdf_file }}"
+
+  tasks:
+    - name: Execute pre-deployment tasks of '{{ deploy_scenario }}' role
+      include_role:
+        name: "{{ engine_cache }}/repos/swconfig/{{ scenario[deploy_scenario].installers[installer_type].role }}"
+        tasks_from: pre-deployment
+      when: hostvars['localhost'].pre_deployment_yml.stat.exists == True
+
+# vim: set ts=2 sw=2 expandtab: