change the variables name to match the role

playbooks/roles/testcourses/defaults/main.yml

@@ -12,7 +12,7 @@
 #
 TESTCOURSES_EXPORTS: []
 
-demo_test_users:
+testcourses_users:
   - email: 'honor@example.com'
     mode: honor
     password: edx
@@ -23,7 +23,7 @@ demo_test_users:
     mode: verified
     password: edx
 
-demo_edxapp_user: 'edxapp'
-demo_edxapp_venv_bin: '{{ COMMON_APP_DIR }}/{{ demo_edxapp_user }}/venvs/{{demo_edxapp_user}}/bin'
-demo_edxapp_course_data_dir: '{{ COMMON_DATA_DIR }}/{{ demo_edxapp_user }}/data'
-demo_edxapp_code_dir: '{{ COMMON_APP_DIR }}/{{ demo_edxapp_user }}/edx-platform'
+testcourses_edxapp_user: 'edxapp'
+testcourses_edxapp_venv_bin: '{{ COMMON_APP_DIR }}/{{ testcourses_edxapp_user }}/venvs/{{ testcourses_edxapp_user }}/bin'
+testcourses_edxapp_course_data_dir: '{{ COMMON_DATA_DIR }}/{{ testcourses_edxapp_user }}/data'
+testcourses_edxapp_code_dir: '{{ COMMON_APP_DIR }}/{{ testcourses_edxapp_user }}/edx-platform'
\ No newline at end of file

playbooks/roles/testcourses/tasks/deploy.yml

 ---
 - name: import the test courses from github
   shell: >
-    {{ demo_edxapp_venv_bin }}/python /edx/bin/manage.edxapp lms git_add_course --settings=aws "{{ item.github_url }}"
+    {{ testcourses_edxapp_venv_bin }}/python /edx/bin/manage.edxapp lms git_add_course --settings=aws "{{ item.github_url }}"
   sudo_user: "{{ common_web_user }}"
   when: item.install == True
   with_items: TESTCOURSES_EXPORTS