ci: fix various issues preventing complete runs

When creating a coe cluster, a flavor lookup occurs which
fails as nothing is specified. This adds a default flavor
which can be used to test cluster provisioning.

Various checks used a deprecated truthy check which no
longer works with Ansible 2.19

Inventory cache format change in Ansible 2.19

galaxy.yml required in tmp testing directory or version
checks fail for linters with Ansible 2.19

Change-Id: Iaf3f05d0841a541e4318821fe44ddd59f236b640

ci/roles/floating_ip/tasks/main.yml

@@ -241,7 +241,7 @@
     that:
       - server1_fips is success
       - server1_fips is not changed
-      - server1_fips.floating_ips
+      - server1_fips.floating_ips|length > 0
       # allow new fields to be introduced but prevent fields from being removed
       - expected_fields|difference(server1_fips.floating_ips[0].keys())|length == 0
 
@@ -260,7 +260,7 @@
 - name: Assert return values of floating_ip module
   assert:
     that:
-      - floating_ip.floating_ip
+      - floating_ip.floating_ip|length > 0
       # allow new fields to be introduced but prevent fields from being removed
       - expected_fields|difference(floating_ip.floating_ip.keys())|length == 0
 
@@ -312,7 +312,7 @@
 - name: Assert floating ip attached to server 2
   assert:
     that:
-      - server2_fip.floating_ip
+      - server2_fip.floating_ip|length > 0
 
 - name: Find all floating ips for debugging
   openstack.cloud.floating_ip_info: