Nodes failed to be bootstrapped if only https is available on master node

[Tatyanka]

Steps to Reproduce:
1. Deploy master node
2. Disable http in nginx container and reload it
3. turn on 3 vms and waiting for it has been bootstrapped

Actual

Nodes failed to be discovered with error in nailgun-agent:

015-08-03T10:17:33.061783+00:00 err: 10:17:33.058210 #1949] ERROR -- : Connection refused - connect(2) (http://10.109.0.2:8000)
2015-08-03T10:17:33.061938+00:00 info: /usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient/session.rb:803:in `initialize'/usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient/session.rb:803:in `new'/usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient/session.rb:803:in `create_socket'/usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient/session.rb:752:in `connect'/usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient/timeout.rb:131:in `timeout'/usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient/session.rb:751:in `connect'/usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient/session.rb:609:in `query'/usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient/session.rb:164:in `query'/usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient.rb:1080:in `do_get_block'/usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient.rb:884:in `do_request'/usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient.rb:978:in `protect_keep_alive_disconnected'/usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient.rb:883:in `do_request'/usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient.rb:771:in `request'/usr/lib/ruby/gems/1.8/gems/httpclient-2.3.2/lib/httpclient.rb:681:in `post'/usr/bin/nailgun-agent:183:in `post'/usr/bin/nailgun-agent:651

VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "7.0"
  openstack_version: "2015.1.0-7.0"
  api: "1.0"
  build_number: "110"
  build_id: "2015-07-30_03-46-56"
  nailgun_sha: "999efffd19b823a27b17f0e97a42ac0d47ae9ce5"
  python-fuelclient_sha: "f04e6c46783ecd6000df31b61b6749da66d4d828"
  fuel-agent_sha: "355c08a04917f047b88f66242767049d2b1d0ff0"
  fuel-nailgun-agent_sha: "1512b9af6b41cc95c4d891c593aeebe0faca5a63"
  astute_sha: "126709e7f18a719ec4bd2a13a37d972285381892"
  fuel-library_sha: "90aff7558fb00373ccd363b7722e2f90dc25894d"
  fuel-ostf_sha: "f907eca277ab4ba769774417d6ff5bf30ef479ee"
  fuelmain_sha: "de5b333815f8541224c6726dc8446ffc7fb18b5b"

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/209170

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/209170
Committed: https://git.openstack.org/cgit/stackforge/fuel-nailgun-agent/commit/?id=e01693992d7a0304d926b922b43f3b747c35964c
Submitter: Jenkins
Branch: master

commit e01693992d7a0304d926b922b43f3b747c35964c
Author: Stanislaw Bogatkin <email address hidden>
Date: Tue Aug 4 19:28:25 2015 +0300

    Add ability to use HTTPS port

    As long as we have HTTPS enabled by default on master node,
    it would be nice to use secure channel for nailgun agent. So,
    this commit switch to HTTPS as default protocol for agent and
    allow to use plain HTTP as a fallback.
    We use SSL no_verify for connection cause now certificate for
    master node nginx generated on container creation and we don't
    have an ability to easily push it to trusted on bootstrap node.

    Change-Id: I570890b19eac74db6f3666af966e86f64327740d
    Closes-Bug: #1480866

[Nikita Marchenko (nmarchenko)]

verified on 224 ISO