Update Swarm version to 1.2.5

We should upgrade swarm because 1.0.0 is more than
one year old and lack features and bug fixes.

Change-Id: Ia236e473ce3152a6bf3115a3bfc62fbf0af100d7
Closes-Bug: 1644620

doc/source/dev/quickstart.rst

@@ -558,7 +558,7 @@ Now that we have a swarm cluster we can start interacting with it::
     | updated_at         | 2015-04-20T19:06:08+00:00                                  |
     | create_timeout     | 60                                                         |
     | api_address        | https://172.24.4.4:6443                                    |
-    | coe_version        | 1.0.0                                                      |
+    | coe_version        | 1.2.5                                                      |
     | cluster_template_id| e73298e7-e621-4d42-b35b-7a1952b97158                       |
     | master_addresses   | ['172.24.4.6']                                             |
     | node_count         | 2                                                          |

install-guide/source/launch-instance.rst

@@ -170,7 +170,7 @@ and one node. Then, using docker's native API you will create a container.
       | updated_at          | 2016-09-14T13:38:08+00:00                                  |
       | discovery_url       | https://discovery.etcd.io/a5ece414689287eca62e35555512bfd5 |
       | api_address         | tcp://172.24.4.10:2376                                     |
-      | coe_version         | 1.0.0                                                      |
+      | coe_version         | 1.2.5                                                      |
       | master_addresses    | ['172.24.4.10']                                            |
       | create_timeout      | 60                                                         |
       | node_addresses      | ['172.24.4.8']                                             |

magnum/drivers/swarm_fedora_atomic_v1/templates/cluster.yaml

@@ -145,7 +145,7 @@ parameters:
   swarm_version:
     type: string
     description: version of swarm used for swarm cluster
-    default: 1.0.0
+    default: 1.2.5
 
   swarm_strategy:
     type: string

releasenotes/notes/update-swarm-73d4340a881bff2f.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - Update Swarm default version to 1.2.5.
+    It should be the last version since Docker people
+    are now working on the new Swarm mode integrated in Docker.