Embedded Ansible backend fails to upgrade while upgrading cloudforms to 4.7

Issue

• As a part of cloudforms upgrade, embedded ansible is also upgraded but here the AWX upgrade fails
  if the existing rabbitmq password contains a special character. Following error reported in the setup
  log file in /var/lib/awx/job_status directory.

TASK [preflight : Preflight check - User must be on Tower 3.0.x to upgrade to 3.1.x] ***

TASK [preflight : Preflight check - rabbitmq_password must be defined] *********
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional result was False"}

TASK [preflight : Preflight check - rabbitmq_password must not contain special characters] ***
fatal: [localhost]: FAILED! => {"changed": false, "msg": "rabbitmq_password may not contain special characters"}
        to retry, use: --limit @/var/lib/awx/setup/install.retry

• Cloudforms got upgraded successfully to 4.7. However, the embedded ansible role fails to activate.