Ensure coe_cluster_template compare labels properly

SDK does return all keys and values of the template labels as
strings. At the same time user can define some labels as integers or
booleans, which will break comparison of labels and lead to module
failure on consecutive runs.

Change-Id: I7ab624428c8bb06030a2b28888f5cb89bb249f08

changelogs/fragments/coe_cluster_template_labels_comparison.yml

@@ -0,0 +1,7 @@
+---
+
+bugfixes:
+  - |
+    coe_cluster_template - now labels are converted to strings by module that
+    fixes module idempotence in case label values defined by users are
+    integers or booleans.

ci/roles/coe_cluster_template/tasks/main.yml

@@ -26,6 +26,9 @@
     keypair_id: '{{ keypair.keypair.id }}'
     name: k8s
     state: present
+    labels:
+      docker_volume_size: 10
+      cloud_provider_tag: v1.23.1
   register: coe_cluster_template
 
 - name: Assert return values of coe_cluster_template module
@@ -43,6 +46,9 @@
     keypair_id: '{{ keypair.keypair.id }}'
     name: k8s
     state: present
+    labels:
+      docker_volume_size: 10
+      cloud_provider_tag: v1.23.1
   register: coe_cluster_template
 
 - name: Assert return values of coe_cluster_template module

plugins/modules/coe_cluster_template.py

@@ -433,6 +433,9 @@ class COEClusterTemplateModule(OpenStackModule):
             if isinstance(labels, str):
                 labels = dict([tuple(kv.split(":"))
                                for kv in labels.split(",")])
+            elif isinstance(labels, dict):
+                labels = dict({str(k): str(v)
+                               for k, v in labels.items()})
             if labels != cluster_template['labels']:
                 non_updateable_keys.append('labels')