Embed pymysql within the collection and use default test container

This change eliminates the need to install the connector on each
controlled node, as `pymysql` version 1.1.1 is now included. As a
result, we can safely assume its availability, thus simplifying the
testing process.

Also, I managed to remove the need for pre-built test containers. We
now use the default test containers from ansible-test.

tests/integration/targets/test_mysql_db/tasks/config_overrides_defaults.yml

@@ -15,39 +15,18 @@
 
 - name: Config overrides | Add blank line
   shell: 'echo "" >> {{ config_file }}'
-  when:
-    - >
-      connector_name != 'pymysql'
-      or (
-        connector_name == 'pymysql'
-        and connector_version is version('0.9.3', '>=')
-      )
 
 - name: Config overrides | Create include_dir
   file:
     path: '{{ include_dir }}'
     state: directory
     mode: '0777'
-  when:
-    - >
-      connector_name != 'pymysql'
-      or (
-        connector_name == 'pymysql'
-        and connector_version is version('0.9.3', '>=')
-      )
 
 - name: Config overrides | Add include_dir
   lineinfile:
     path: '{{ config_file }}'
     line: '!includedir {{ include_dir }}'
     insertafter: EOF
-  when:
-    - >
-      connector_name != 'pymysql'
-      or (
-        connector_name == 'pymysql'
-        and connector_version is version('0.9.3', '>=')
-      )
 
 - name: Config overrides | Create database using fake port to connect to, must fail
   mysql_db:

tests/integration/targets/test_mysql_db/tasks/issue-28.yml

@@ -49,19 +49,8 @@
         login_port: '{{ mysql_primary_port }}'
         ca_cert: /tmp/cert.pem
       register: result
-      ignore_errors: yes
-
-    - assert:
-        that:
-          - result is failed
-      when:
-        - connector_name == 'pymysql'
-
-    - assert:
-        that:
-          - result is succeeded
-      when:
-        - connector_name != 'pymysql'
+      failed_when:
+        - result is success
 
     - name: attempt connection with newly created user ignoring hostname
       mysql_db:
@@ -74,11 +63,6 @@
         ca_cert: /tmp/cert.pem
         check_hostname: no
       register: result
-      ignore_errors: yes
-
-    - assert:
-        that:
-          - result is succeeded or 'pymysql >= 0.7.11 is required' in result.msg
 
     - name: Drop mysql user
       mysql_user: