Add undercloud upgrades playbook.

This new playbook configures repositories
in the undercloud before upgrade, imports
the needed branch of tripleo-upgrade role
and executes the role.

Change-Id: I7e8cc0c590ba1ec3a21a9a7545ac3318929387c2

playbooks/multinode-overcloud-upgrade-new.yml

@@ -85,4 +85,4 @@
         upgrade_init_command: "{{ update_repo_script_content }}"
       include_role:
         name: tripleo-upgrade
-      when: containerized_overcloud_upgrade|bool or undercloud_upgrade|default(false)|bool
+      when: containerized_overcloud_upgrade|bool

playbooks/multinode-undercloud-upgrade.yml

@@ -0,0 +1,20 @@
+- name: Configure next release repository in the undercloud
+  hosts: undercloud
+  tags:
+    - undercloud-upgrade
+  vars:
+    repo_setup_script: "repo-setup-{{ lookup('env', 'UPGRADE_RELEASE') }}.sh"
+    repo_setup_log: "repo-setup-{{ lookup('env', 'UPGRADE_RELEASE') }}.log"
+    repo_setup_run_update: false
+    dlrn_hash_path: ''
+    dlrn_hash_path_newest: ''
+  roles:
+    - role: repo-setup
+
+- name: Run tripleo-upgrade role to upgrade undercloud
+  hosts: undercloud
+  tags:
+    - undercloud-upgrade
+  roles:
+    - role: tripleo-upgrade
+