Add memory swap to swarm

Adds support for setting memory swap settings on Swarm services

* Adds flags `memory-swap` and `memory-swappiness` to `docker service
create` and `docker service update` commands.
* Adds compose fields `memswap_limit` and `mem_swappiness` for `docker
stack` commands.

Signed-off-by: Drew Erny <derny@mirantis.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/compose/schema/data/config_schema_v3.14.json

@@ -1,12 +1,12 @@
 {
   "$schema": "http://json-schema.org/draft-04/schema#",
-  "id": "config_schema_v3.13.json",
+  "id": "config_schema_v3.14.json",
   "type": "object",
 
   "properties": {
     "version": {
       "type": "string",
-      "default": "3.13"
+      "default": "3.14"
     },
 
     "services": {
@@ -413,6 +413,12 @@
                 "generic_resources": {"$ref": "#/definitions/generic_resources"}
               },
               "additionalProperties": false
+            },
+            "memswap_limit": {
+              "type": "integer"
+            },
+            "mem_swappiness": {
+              "type": "integer"
             }
           },
           "additionalProperties": false