mysql/database: rewrote usage of include_tasks to be better compatible with tags

roles/mysql/database/tasks/main.yml

@@ -23,5 +23,14 @@
   register: create_database
 
 - name: Import SQL database template on creation
-  include_tasks: import.yml
+  include_tasks:
-  when: create_database.changed and database_template is defined
+    file: import.yml
+    apply:
+      tags:
+        - mysql_database
+  when:
+    - create_database is defined
+    - create_database.changed
+    - database_template is defined
+  tags:
+    - always