Add custom_bind_mounts to so-kafka and so-soc

Every container in docker/defaults.yaml exposes custom_bind_mounts via
soc_docker.yaml, but kafka and soc enabled.sls never appended them to
binds, so the setting was silently ignored for those two containers.

salt/kafka/enabled.sls

@@ -61,6 +61,11 @@ so-kafka:
       {% if KAFKA_EXTERNAL_ACCESS %}
       - /opt/so/conf/kafka/kafka_server_jaas.conf:/opt/kafka/config/kafka_server_jaas.conf:ro
       {% endif %}
+      {% if DOCKERMERGED.containers['so-kafka'].custom_bind_mounts %}
+        {% for BIND in DOCKERMERGED.containers['so-kafka'].custom_bind_mounts %}
+      - {{ BIND }}
+        {% endfor %}
+      {% endif %}
     {% if DOCKERMERGED.containers['so-kafka'].ulimits %}
     - ulimits:
     {%   for ULIMIT in DOCKERMERGED.containers['so-kafka'].ulimits %}

salt/soc/enabled.sls

@@ -62,6 +62,11 @@ so-soc:
       - /nsm/backup/detections-migration:/nsm/backup/detections-migration:ro
       - /opt/so/state:/opt/so/state:rw
       - /etc/pki/tls/certs/intca.crt:/opt/sensoroni/html/so-ca.crt:ro
+      {% if DOCKERMERGED.containers['so-soc'].custom_bind_mounts %}
+        {% for BIND in DOCKERMERGED.containers['so-soc'].custom_bind_mounts %}
+      - {{ BIND }}
+        {% endfor %}
+      {% endif %}
     - extra_hosts:
     {% for node in DOCKER_EXTRA_HOSTS %}
     {%   for hostname, ip in node.items() %}