Normalize bools in tests. (#589)

tests/integration/targets/docker_prune/tasks/main.yml

@@ -41,11 +41,11 @@
 
   # Prune objects
   - docker_prune:
-      containers: yes
-      images: yes
-      networks: yes
-      volumes: yes
-      builder_cache: yes
+      containers: true
+      images: true
+      networks: true
+      volumes: true
+      builder_cache: true
     register: result
 
   # Analyze result
@@ -84,7 +84,7 @@
   # Test with filters
   - name: Prune with filters
     docker_prune:
-      images: yes
+      images: true
       images_filters:
         dangling: true
     register: result
@@ -98,7 +98,7 @@
     block:
     - name: Prune with filters
       docker_prune:
-        volumes: yes
+        volumes: true
         volumes_filters:
           all: true
       register: result