Allow users to skip services to cut down on conflicts

We have received complaints that the openstack-service-setup.yml
playbooks will try to overwrite flavors and images of the same
name that may have different attributes.  This is due to them
requiring some unique configurations that just so happen to
have been using the same name in tests.  The tag additions
will allow them to work around this by skipping the ones
conflicting with existing entries.

Change-Id: I3eef87f522a219d094181fa64933f86142b060ef
Closes-Bug: 1760219

multi-node-aio/playbooks/openstack-service-setup.yml

@@ -34,6 +34,8 @@
       swap: "{{ item.swap }}"
       ephemeral: "{{ item.ephemeral }}"
     with_items: "{{ vm_flavors }}"
+    tags:
+      - create_flavors
 
   - name: Create networks
     os_network:
@@ -46,6 +48,8 @@
       provider_network_type: "{{ item.network_type }}"
       provider_physical_network: "{{ item.physical_network | default ('') }}"
     with_items: "{{ networks }}"
+    tags:
+      - create_networks
 
   - name: Create subnets on networks
     os_subnet:
@@ -62,6 +66,8 @@
       allocation_pool_end: "{{ item.allocation_pool_end }}"
       dns_nameservers: "{{ item.dns_nameservers | default([]) }}"
     with_items: "{{ subnets }}"
+    tags:
+      - create_networks
 
   - name: Create a router on both public and private networks
     os_router:
@@ -74,6 +80,8 @@
         - "{{ private_subnet_name }}"
     ignore_errors: yes  # will report error if this router already exists
     register: router_details
+    tags:
+      - create_networks
 
   - name: Get list of security groups
     # Must use shell here because Ansible does not have os_security_group_facts module
@@ -81,6 +89,8 @@
     args:
       executable: /bin/bash
     register: sec_groups
+    tags:
+      - create_networks
 
   - name: Setup rules on all security groups
     os_security_group_rule:
@@ -94,8 +104,12 @@
     with_nested:
       - "{{ security_group_rules }}"
       - "{{ sec_groups.stdout_lines }}"
+    tags:
+      - create_networks
 
 # Install some Linux system images
   - include: ./openstack-image-setup.yml
     with_items: "{{ images }}"
+    tags:
+      - create_images