Configure rsyslog to listen over a unix domain socket instead of a port

- Add a placeholder rsyslog.conf so it doesn't fail on start
 - Create access restricted directory for unix socket to be created in
 - Create RSyslogHandler to exit early when logging socket doesn't exist
 - Write updated logging settings when dispatcher comes up and restart rsyslog so they  take effect
 - Move rsyslogd to the web container and create rpc supervisor.sock
 - Add env var for supervisor.conf path

installer/roles/local_docker/templates/docker-compose.yml.j2

@@ -20,6 +20,8 @@ services:
     user: root
     restart: unless-stopped
     volumes:
+      - sockets:/var/run/tower/sockets/
+      - rsyslog:/var/lib/awx/rsyslog/
       - "{{ docker_compose_dir }}/SECRET_KEY:/etc/tower/SECRET_KEY"
       - "{{ docker_compose_dir }}/environment.sh:/etc/tower/conf.d/environment.sh"
       - "{{ docker_compose_dir }}/credentials.py:/etc/tower/conf.d/credentials.py"
@@ -75,6 +77,8 @@ services:
     user: root
     restart: unless-stopped
     volumes:
+      - sockets:/var/run/tower/sockets/
+      - rsyslog:/var/lib/awx/rsyslog/
       - "{{ docker_compose_dir }}/SECRET_KEY:/etc/tower/SECRET_KEY"
       - "{{ docker_compose_dir }}/environment.sh:/etc/tower/conf.d/environment.sh"
       - "{{ docker_compose_dir }}/credentials.py:/etc/tower/conf.d/credentials.py"
@@ -114,6 +118,7 @@ services:
       http_proxy: {{ http_proxy | default('') }}
       https_proxy: {{ https_proxy | default('') }}
       no_proxy: {{ no_proxy | default('') }}
+      SUPERVISOR_WEB_CONFIG_PATH: '/supervisor.conf'
 
   redis:
     image: {{ redis_image }}
@@ -157,3 +162,6 @@ services:
       https_proxy: {{ https_proxy | default('') }}
       no_proxy: {{ no_proxy | default('') }}
   {% endif %}
+volumes:
+  sockets:
+  rsyslog: