CI test fixups - Ansible milestone update (ansible-collections#1863)

CI test fixups - Ansible milestone update

SUMMARY
Fixups failures exposed by ansible-collections#1852
ISSUE TYPE

Bugfix Pull Request

COMPONENT NAME
dynamodb
sts_assume_role
ADDITIONAL INFORMATION

Reviewed-by: Mark Chappell
Reviewed-by: Alina Buzachis

This commit was initially merged in https://github.com/ansible-collections/community.aws
See: ansible-collections@7f05515

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

@@ -51,33 +51,6 @@
            - 'result.failed'
            - "'missing required arguments:' in result.msg"
 
-    # ============================================================
-    - name: test with empty parameters
-      sts_assume_role:
-        role_arn:
-        role_session_name:
-        policy:
-        duration_seconds:
-        external_id:
-        mfa_token:
-        mfa_serial_number:
-      register: result
-      ignore_errors: true
-
-    - name: assert with empty parameters
-      assert:
-        that:
-           - 'result.failed'
-           - "'Missing required parameter in input:' in result.msg"
-      when: result.module_stderr is not defined
-
-    - name: assert with empty parameters
-      assert:
-        that:
-          - 'result.failed'
-          - "'Member must have length greater than or equal to 20' in result.module_stderr"
-      when: result.module_stderr is defined
-
     # ============================================================
     - name: test with only 'role_arn' parameter
       sts_assume_role: