Allow TLS 1.2 for Receptor connections

- Required for FIPS environment where TLS 1.3 is
not supported
- TLS 1.3 can still be used if the nodes
both agree to use during handshake.

awx/api/templates/instance_install_bundle/group_vars/all.yml

@@ -2,6 +2,7 @@ receptor_user: awx
 receptor_group: awx
 receptor_verify: true
 receptor_tls: true
+receptor_mintls13: false
 receptor_work_commands:
   ansible-runner:
     command: ansible-runner