Consolidate the Local Docker installer and the dev env

- removes local_docker installer and points community users to our development environment (make docker-compose)
  - provides a migration path from Local Docker Compose installations --> the dev environment
  - the dev env can now be configured to use an external database
  - consolidated the Local Docker and dev env docker-compose.yml files into one template file, used by the dockerfile role
  - added a 'sources' role to template out config files
  - the postgres data dir is no longer a bind-mount, it is a docker volume
  - the redis socket is not longer a bind-mount, it is a docker volume
  - the local_settings.py.docker-compose file no longer needs to be copied over in the dev env
  - Create tmp rsyslog.conf in rsyslog volume to avoid cross-linking. Previously, the tmp code-generated rsyslog.conf was being written to /tmp (by default).  As a result, we were attempting to shutil.move() across volumes.
  - move k8s image build and push roles under tools/ansible
  - See tools/docker-compose/README.md for usage of these changes

tools/docker-compose/docs/logstash.md

@@ -0,0 +1,49 @@
+# How to use the logstash container
+
+#### Modify the docker-compose.yml
+
+Uncomment the following lines in the `docker-compose.yml`
+
+```
+#- logstash
+...
+
+#logstash:
+#  build:
+#    context: ./docker-compose
+#    dockerfile: Dockerfile-logstash
+```
+
+POST the following content to `/api/v2/settings/logging/` (this uses
+authentication set up inside of the logstash configuration file).
+
+```
+{
+    "LOG_AGGREGATOR_HOST": "http://logstash",
+    "LOG_AGGREGATOR_PORT": 8085,
+    "LOG_AGGREGATOR_TYPE": "logstash",
+    "LOG_AGGREGATOR_USERNAME": "awx_logger",
+    "LOG_AGGREGATOR_PASSWORD": "workflows",
+    "LOG_AGGREGATOR_LOGGERS": [
+        "awx",
+        "activity_stream",
+        "job_events",
+        "system_tracking"
+    ],
+    "LOG_AGGREGATOR_INDIVIDUAL_FACTS": false,
+    "LOG_AGGREGATOR_TOWER_UUID": "991ac7e9-6d68-48c8-bbde-7ca1096653c6",
+    "LOG_AGGREGATOR_ENABLED": true
+}
+```
+
+> Note: HTTP must be specified in the `LOG_AGGREGATOR_HOST` if you are using the docker development environment.  
+
+An example of how to view the most recent logs from the container:
+
+```
+docker exec -i -t $(docker ps -aqf "name=tools_logstash_1") tail -n 50 /logstash.log
+```
+
+#### How to add logstash plugins
+
+Add any plugins you need in `tools/elastic/logstash/Dockerfile` before running the container.