`ansible-dnac` install doesn't copy dnac.py

[jandiorio]

Context

Currently, the install playbook doesn't place the httpapi plugin into a location where Ansible can find it.

Process

1. Run the collection installation
2. attempt to consume the collection

Expected Result

Testing of the collection would succeed

Current Result

root@b6498371d394:/development/ansible-dnac/playbooks# ansible-playbook -i hosts.yml test_facts.yml 

PLAY [Testing ansible-dnac Collection] ***********************************************************************************************************

TASK [get devices] *******************************************************************************************************************************
fatal: [dnac-prod.campus.wwtatc.local]: FAILED! => {"msg": "unable to load API plugin for network_os dnac"}

PLAY RECAP ***************************************************************************************************************************************
dnac-prod.campus.wwtatc.local : ok=0    changed=0    unreachable=0    failed=1    skipped=0    rescued=0    ignored=0   

Possible Fix

Update the existing installer/install.yaml with:

    - name: validate path exists 
      file:
        path: "{{ item }}"
        state: directory 
      loop:  "{{ lookup('config', 'DEFAULT_HTTPAPI_PLUGIN_PATH') }}"  

    - name: link the dnac.py to the plugins/httpapi folder
      file:
        src:  "{{ playbook_dir }}/plugins/httpapi/dnac.py"
        path: "{{ item }}/dnac.py"
        state: link
      loop: "{{ lookup('config', 'DEFAULT_HTTPAPI_PLUGIN_PATH') }}"