Remove all Heka related remaining stuff

Heka has been removed and replaced by fluentd.
Refer to https://review.openstack.org/#/c/437874/

Change-Id: Id9f95cbefcd4b1089e2a00a92dc66f387c27f09b

ansible/roles/nova/defaults/main.yml

@@ -32,7 +32,6 @@ nova_services:
       - "kolla_logs:/var/log/kolla"
       - "nova_compute:/var/lib/nova"
       - "{% if enable_cinder_backend_nfs | bool %}/var/lib/nova/mnt:/var/lib/nova/mnt:shared{% endif %}"
-      - "heka_socket:/var/lib/kolla/heka/"
   placement-api:
     container_name: "placement_api"
     group: "placement-api"

ansible/roles/swift/tasks/start.yml

@@ -160,7 +160,6 @@
       - "{{ node_config_directory }}/swift-object-server/:{{ container_config_directory }}/:ro"
       - "{{ swift_devices_mount_point }}:{{ swift_devices_mount_point }}"
       - "/etc/localtime:/etc/localtime:ro"
-      - "heka_socket:/var/lib/kolla/heka/"
   when: inventory_hostname in groups['swift-object-server']
 
 - name: Starting swift-object-auditor container

doc/CONTRIBUTING.rst

@@ -139,13 +139,6 @@ that Kolla uses throughout that should be followed.
     include service specific setup and steps as not all services can be
     upgraded in the same way.
 
-* Log delivery
-
-  - For OpenStack services the service has be added to the ``file_match``
-    parameter in the ``openstack_logstreamer_input`` section in the
-    ``heka-openstack.toml.j2`` template file in
-    ``ansible/roles/comm/templates`` to deliver log messages to Elasticsearch.
-
 * Logrotation
 
   - For OpenStack services there should be a ``cron-logrotate-PROJECT.conf.j2``

doc/troubleshooting.rst

@@ -61,7 +61,7 @@ The logs can be examined by executing:
 
 ::
 
-    docker exec -it heka bash
+    docker exec -it fluentd bash
 
 The logs from all services in all containers may be read from
 ``/var/log/kolla/SERVICE_NAME``