Remove dev env futzing of supervisord.conf permissions

If we just link it into the dev env, we don't need to copy it at
startup, and we don't need write permissions on it.

tools/docker-compose.yml

@@ -35,6 +35,7 @@ services:
       - "./redis/redis_socket_standalone:/var/run/redis/"
       - "./memcached/:/var/run/memcached"
       - "./rsyslog/:/var/lib/awx/rsyslog"
+      - "./docker-compose/supervisor.conf:/etc/supervisord.conf"
     privileged: true
     tty: true
   # A useful container that simply passes through log messages to the console