Fix integration tests to support remote hosts.

test/integration/targets/prepare_http_tests/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - setup_remote_tmp_dir

test/integration/targets/prepare_http_tests/tasks/main.yml

@@ -37,7 +37,7 @@
     - name: Get client cert/key
       get_url:
         url: "http://ansible.http.tests/{{ item }}"
-        dest: "{{ output_dir }}/{{ item }}"
+        dest: "{{ remote_tmp_dir }}/{{ item }}"
       when: ansible_os_family != 'Windows'
       with_items:
         - client.pem