refactor to comply with current ansible-lint and sanity guidelines

Signed-off-by: Adam Miller <admiller@redhat.com>

tests/integration/targets/at/meta/main.yml

@@ -1,2 +1,3 @@
+---
 dependencies:
   - prepare_tests

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

@@ -1,3 +1,4 @@
+---
 # Test code for the at module.
 # (c) 2017, James Tanner <tanner.jc@gmail.com>
 
@@ -16,47 +17,56 @@
 # You should have received a copy of the GNU General Public License
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 
-- set_fact: output_dir_test={{output_dir}}/at
+- name: Set output_dir_test fast
+  ansible.builtin.set_fact:
+    output_dir_test: "{{ output_dir }}/at"
 
-- name: make sure our testing sub-directory does not exist
-  file: path="{{ output_dir_test }}" state=absent
+- name: Make sure our testing sub-directory does not exist
+  ansible.builtin.file:
+    path: "{{ output_dir_test }}"
+    state: absent
 
-- name: create our testing sub-directory
-  file: path="{{ output_dir_test }}" state=directory
+- name: Create our testing sub-directory
+  ansible.builtin.file:
+    path: "{{ output_dir_test }}"
+    state: directory
+    mode: "0755"
 
 ##
 ## at
 ##
 
-- name: define distros to attempt installing at on 
-  set_fact:
+- name: Define distros to attempt installing at on
+  ansible.builtin.set_fact:
     package_distros:
-        - RedHat
-        - CentOS
-        - ScientificLinux
-        - Fedora
-        - Ubuntu
-        - Debian
-        - openSUSE Leap
+      - RedHat
+      - CentOS
+      - ScientificLinux
+      - Fedora
+      - Ubuntu
+      - Debian
+      - openSUSE Leap
 
-- name: ensure at is installed
-  package:
+- name: Ensure at is installed
+  ansible.builtin.package:
     name: at
     state: present
   when: ansible_distribution in package_distros
 
-- name: run the first example
-  at:
-    command: "ls -d / > /dev/null"
+- name: Run the first example
+  ansible.posix.at:
+    command: ls -d / > /dev/null
     count: 20
     units: minutes
   register: at_test0
-- debug: var=at_test0
-- name: validate results
-  assert:
-      that:
-          - 'at_test0.changed is defined'
-          - 'at_test0.count is defined'
-          - 'at_test0.script_file is defined'
-          - 'at_test0.state is defined'
-          - 'at_test0.units is defined'
+- name: Debug var=at_test0
+  ansible.builtin.debug:
+    var: at_test0
+- name: Validate results
+  ansible.builtin.assert:
+    that:
+      - at_test0.changed is defined
+      - at_test0.count is defined
+      - at_test0.script_file is defined
+      - at_test0.state is defined
+      - at_test0.units is defined