Update Readme and validate certs on workflow (#193)

* update versions of checks and fix linting

* update omits

README.md

@@ -6,6 +6,20 @@
 
 This Ansible collection allows for easy interaction with an AWX or Ansible Tower server via Ansible roles using the AWX/Tower collection modules.
 
+# REQUIREMENTS
+The AWX.AWX OR ANSIBLE.TOWER collections MUST be installed in order for this collection to work. It is recomended they be invoked in the playbook in the following way. 
+
+```yaml
+---
+- name: Playbook to configure ansible tower post installation
+  hosts: localhost
+  connection: local
+  vars:
+    tower_validate_certs: false
+  collections:
+    - ansible.tower
+```
+
 ## Included content
 
 Click the `Content` button to see the list of content included in this collection.

roles/workflow_job_templates/tasks/main.yml

@@ -33,7 +33,7 @@
     tower_oauthtoken:                   "{{ tower_oauthtoken | default(omit, true) }}"
     tower_host:                         "{{ tower_hostname | default(omit) }}"
     tower_config_file:                  "{{ tower_config_file | default(omit, true) }}"
-    validate_certs:                     "{{ tower_validate_certs | default(omit, true) }}"
+    validate_certs:                     "{{ tower_validate_certs | default(omit) }}"
   loop: "{{ tower_workflows }}"
   loop_control:
     loop_var: workflow_loop_var