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/package/aliases

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

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

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+dependencies:
+  - prepare_tests

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

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+# Test code for the package 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}}/at
+
+- 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
+
+##
+## package
+##
+
+- name: define distros to attempt installing at on 
+  set_fact:
+    package_distros:
+        - RedHat
+        - CentOS
+        - ScientificLinux
+        - Fedora
+        - Ubuntu
+        - Debian
+
+- block:
+    - name: remove at package
+      package:
+        name: at
+        state: absent
+      register: at_check0
+
+    - name: verify at command is missing
+      shell: which at
+      register: at_check1
+      failed_when: at_check1.rc == 0
+
+    - name: reinstall at package
+      package:
+          name: at
+          state: present
+      register: at_install0
+    - debug: var=at_install0
+    - name: validate results
+      assert:
+          that:
+              - 'at_install0.changed is defined'
+              - 'at_install0.changed'
+
+    - name: verify at command is installed
+      shell: which at
+
+  when: ansible_distribution in package_distros