Redeployment has failed after adding/removing controllers.

1. Create new environment (Ubuntu) with ceilometer-redis plugin.
2. Add 3 controllers, mongoDB and 2 computes, ceph-osd
3. Start deployment. It was successful
4. Run OSTF test. It was successful
5. Remove 1 controllers, mongoDB
6. Start deployment. It has failed with error: Deployment has failed. Method granular_deploy.

Astute logs:
ERR [683] Error running RPC method granular_deploy: Deployment failed on nodes 7, trace:
["/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/deployment_engine.rb:68:in `block (3 levels) in deploy'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/deployment_engine.rb:51:in `each_slice'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/deployment_engine.rb:51:in `block (2 levels) in deploy'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/deployment_engine.rb:49:in `each'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/deployment_engine.rb:49:in `block in deploy'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/deployment_engine.rb:45:in `each'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/deployment_engine.rb:45:in `deploy'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/orchestrator.rb:179:in `deploy_cluster'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/orchestrator.rb:45:in `granular_deploy'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/server/dispatcher.rb:91:in `granular_deploy'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/server/server.rb:146:in `dispatch_message'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/server/server.rb:107:in `block in dispatch'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/server/task_queue.rb:64:in `call'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/server/task_queue.rb:64:in `block in each'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/server/task_queue.rb:56:in `each'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/server/task_queue.rb:56:in `each'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/server/server.rb:105:in `each_with_index'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/server/server.rb:105:in `dispatch'",
"/usr/lib64/ruby/gems/2.1.0/gems/astute-7.0.0/lib/astute/server/server.rb:89:in `block in perform_main_job'"]
2015-11-16 16:15:04 ERR [683] No more tasks will be executed on the node 7
2015-11-16 16:15:04 ERR [683] Task '{"priority"=>3800, "type"=>"puppet", "uids"=>["7"], "parameters"=>{"puppet_modules"=>"/etc/puppet/modules", "puppet_manifest"=>"/etc/puppet/modules/osnailyfacter/modular/swift/keystone.pp", "timeout"=>1800, "cwd"=>"/"}}' failed on node 7

Diagnostic snapshot: https://drive.google.com/file/d/0BwaC3uGIjkLzZ2p5azJFbGEtYlE/view?usp=sharing