Fix skipping start and bootstrap of RabbitMQ

When building a kolla image for bifrost we need to skip starting
services and bootstrapping tasks. This needs to apply also to the
RabbitMQ role.

Also removes rabbitmq packages that crept into the package list for
Ubuntu 18.04.

Change-Id: I5698ccf85f9b909cb23c611b8329b3f363430793

playbooks/roles/bifrost-ironic-install/defaults/required_defaults_Ubuntu_18.04.yml

@@ -4,7 +4,6 @@ init_dest_dir: /lib/systemd/system/
 init_ext: .service
 required_packages:
   - mysql-server
-  - rabbitmq-server
   - python-dev
   - python-mysqldb
   - python-configparser

playbooks/roles/bifrost-ironic-install/tasks/main.yml

@@ -54,7 +54,7 @@
 - name: "Install RabbitMQ if required"
   import_role:
     name: bifrost-rabbitmq
-  when: use_rabbitmq
+  when: use_rabbitmq | bool
 
 - name: "Install Ironic deps"
   include: install.yml

playbooks/roles/bifrost-keystone-install/defaults/required_defaults_Ubuntu_18.04.yml

@@ -4,7 +4,6 @@ init_dest_dir: /lib/systemd/system/
 init_ext: .service
 required_packages:
   - mysql-server
-  - rabbitmq-server
   - python-dev
   - python-mysqldb
   - python-configparser

playbooks/roles/bifrost-rabbitmq/tasks/main.yml

@@ -15,7 +15,7 @@
   package:
     name: "{{ rabbitmq_package }}"
     state: present
-  when: skip_package_install | bool != True
+  when: not skip_package_install | bool
 
 # NOTE(hwoarang): The erlang SUSE package forces epmd to listen on localhost
 # address which breaks rabbitmq-server when listening on a different address.
@@ -37,12 +37,16 @@
       with_items:
         - epmd.socket
         - epmd
-  when: ansible_os_family == 'Suse'
+  when:
+    - ansible_os_family == 'Suse'
+    - not skip_bootstrap | bool
 
 - import_tasks: start.yml
+  when: not skip_start | bool
 
 - name: "Ensure guest user is removed from rabbitmq"
   rabbitmq_user:
     user: "guest"
     state: absent
     force: yes
+  when: not skip_bootstrap | bool