Modifying sample for test_become to show more test cases

v2/samples/roles/test_become_r1/meta/main.yml

-#allow_duplicates: yes
+allow_duplicates: yes

v2/samples/roles/test_become_r2/meta/main.yml

-#allow_duplicates: yes
+allow_duplicates: yes
 dependencies:
   - test_become_r1

v2/samples/test_become.yml

 - hosts: all
   gather_facts: no
+  remote_user: root
   roles:
+  - { role: test_become_r2 }
   - { role: test_become_r2, sudo_user: testing }
   tasks:
   - command: whoami
+  - command: whoami
     become_user: testing
   - block:
     - command: whoami
+  - block:
+    - command: whoami
     become_user: testing