Add integration test targets for core supported modules (#24217)

A preliminary set of test targets for "core" supported module that had no independent tests. These will also help us ensure python3 compatibility for those modules and prevent future regressions.

test/integration/targets/apt_key/aliases

@@ -0,0 +1 @@
+posix/ci/group1

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

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

test/integration/targets/apt_key/tasks/apt_key.yml

@@ -0,0 +1,19 @@
+- name: run first docs example
+  apt_key:
+    keyserver: keyserver.ubuntu.com
+    id: 36A1D7869245C8950F966E92D8576A8BA88D21E9
+  register: apt_key_test0
+- debug: var=apt_key_test0
+
+- name: re-run first docs example
+  apt_key:
+    keyserver: keyserver.ubuntu.com
+    id: 36A1D7869245C8950F966E92D8576A8BA88D21E9
+  register: apt_key_test1
+
+- name: validate results
+  assert:
+      that:
+          - 'apt_key_test0.changed is defined'
+          - 'apt_key_test0.changed'
+          - 'not apt_key_test1.changed'

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

@@ -0,0 +1,28 @@
+# Test code for the apt_key module.
+# (c) 2017, James Tanner <tanner.jc@gmail.com>
+
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# 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}}/apt_key
+
+- name: make sure our testing sub-directory does not exist
+  file: path="{{ output_dir_test }}" state=absent
+
+- name: create our testing sub-directory
+  file: path="{{ output_dir_test }}" state=directory
+
+- include: 'apt_key.yml'
+  when: ansible_distribution in ('Ubuntu', 'Debian')