remove_ceph_mons: A JSON text must at least contain two octets!

[Vladimir Sharshov]

Step to reproduce:

1. Create cluster with cinder nodes without ceph
2. Add mistake for primary-controller manifest
3. Deploy
4. Get deployment error
4. Try to delete controller node

Including fix https://review.openstack.org/#/c/182068/

 Error running RPC method remove_nodes: A JSON text must at least contain two octets!, trace:
["/usr/lib64/ruby/2.1.0/json/common.rb:155:in `initialize'",
 "/usr/lib64/ruby/2.1.0/json/common.rb:155:in `new'",
 "/usr/lib64/ruby/2.1.0/json/common.rb:155:in `parse'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/pre_delete.rb:90:in `remove_ceph_mons'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/orchestrator.rb:200:in `remove_ceph_mons'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/orchestrator.rb:208:in `perform_pre_deletion_tasks'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/orchestrator.rb:101:in `remove_nodes'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/server/dispatcher.rb:168:in `remove_nodes'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/server/server.rb:142:in `dispatch_message'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/server/server.rb:103:in `block in dispatch'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/server/task_queue.rb:64:in `call'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/server/task_queue.rb:64:in `block in each'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/server/task_queue.rb:56:in `each'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/server/task_queue.rb:56:in `each'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/server/server.rb:101:in `each_with_index'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/server/server.rb:101:in `dispatch'",
 "/usr/lib64/ruby/gems/2.1.0/gems/astute-6.1.0/lib/astute/server/server.rb:85:in `block in perform_main_job'"]

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/182100

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/182100
Committed: https://git.openstack.org/cgit/stackforge/fuel-astute/commit/?id=6be83225930ffff4e06feaa04cb97a1f8bfe2de1
Submitter: Jenkins
Branch: master

commit 6be83225930ffff4e06feaa04cb97a1f8bfe2de1
Author: Vladimir Sharshov (warpc) <email address hidden>
Date: Tue May 12 00:56:11 2015 +0300

    Exception handling in case of unconfigured or not-installed ceph mons

    Change-Id: I5371cc9085f0d501d23f8f91b352ed0e08598880
    Closes-Bug: #1453975

[Alyona Kiseleva (akiselyova)]

Verified on
VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "6.1"
  openstack_version: "2014.2.2-6.1"
  api: "1.0"
  build_number: "437"
  build_id: "2015-05-19_10-05-51"
  nailgun_sha: "593c99f2b46cf52b2be6c7c6e182b6ba9f2232cd"
  python-fuelclient_sha: "e19f1b65792f84c4a18b5a9473f85ef3ba172fce"
  astute_sha: "96801c5bccb14aa3f2a0d7f27f4a4b6dd2b4a548"
  fuel-library_sha: "2814c51668f487e97e1449b078bad1942421e6b9"
  fuel-ostf_sha: "9ce1800749081780b8b2a4a7eab6586583ffaf33"
  fuelmain_sha: "68796aeaa7b669e68bc0976ffd616709c937187a"