Fix cluster config update

[liyi]

cluster config property can not be updated using API 'PATCH /v1/clusters/{cluster_id}'.

Reproduce step:
1. call 'POST /v1/clusters' to create a cluster with body:
{
    "cluster": {
     "config": {"key1": "value1"},
        "desired_capacity": 0,
        "max_size": -1,
        "metadata": {},
        "min_size": 0,
        "name": "mycluster",
        "profile_id": "stack_profile",
        "timeout": null
    }
}
2. show the cluster with API '', output:
{
  "cluster": {
    "config": {
      "key1": "value1"
    },
    "created_at": "2017-07-13T01:03:52Z",
    "data": {},
    "dependents": {},
    "desired_capacity": 0,
    "domain": null,
    "id": "faad15af-8b0e-402e-a89b-1d4dfda6de9e",
    "init_at": "2017-07-13T01:03:52Z",
    "max_size": -1,
    "metadata": {},
    "min_size": 0,
    "name": "mycluster",
    "nodes": [],
    "policies": [],
    "profile_id": "853e46d8-37b9-4ea6-868c-47f73b72f859",
    "profile_name": "stack_profile",
    "project": "f1fe61dcda2f4618a14c10dc7abc214d",
    "status": "ACTIVE",
    "status_reason": "CLUSTER_CREATE: number of active nodes is equal or above desired_capacity (0).",
    "timeout": 3600,
    "updated_at": "2017-07-13T01:03:52Z",
    "user": "8bcd2cdca7684c02afc9e4f2fc0f0c79"
  }
}

The config property is correct!

3. update cluster with config '{"key1": "value-modify"}':
{
    "cluster": {
     "config": {"key1": "value-modify"}
    }
}

4. show cluster detail:
{
  "cluster": {
    "config": {
      "key1": "value1"
    },
    "created_at": "2017-07-13T01:03:52Z",
    "data": {},
    "dependents": {},
    "desired_capacity": 0,
    "domain": null,
    "id": "faad15af-8b0e-402e-a89b-1d4dfda6de9e",
    "init_at": "2017-07-13T01:03:52Z",
    "max_size": -1,
    "metadata": {},
    "min_size": 0,
    "name": "mycluster",
    "nodes": [],
    "policies": [],
    "profile_id": "853e46d8-37b9-4ea6-868c-47f73b72f859",
    "profile_name": "stack_profile",
    "project": "f1fe61dcda2f4618a14c10dc7abc214d",
    "status": "ACTIVE",
    "status_reason": "CLUSTER_UPDATE: number of active nodes is equal or above desired_capacity (0).",
    "timeout": 3600,
    "updated_at": "2017-07-13T01:06:46Z",
    "user": "8bcd2cdca7684c02afc9e4f2fc0f0c79"
  }
}

The config property didn't be updated.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/483146

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/483146
Committed: https://git.openstack.org/cgit/openstack/senlin/commit/?id=8a23231a453c0a1e015590de3edc53212e3fcb1e
Submitter: Jenkins
Branch: master

commit 8a23231a453c0a1e015590de3edc53212e3fcb1e
Author: liyi <email address hidden>
Date: Thu Jul 13 09:08:33 2017 +0800

    Fix cluster config updating operation

    Cluster config property can not be updated correctly.

    Change-Id: I28ac448b488bf14c0734b917642095a8ae51ae11
    Closes-Bug: #1704025

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/senlin 4.0.0.0b3 development milestone.