Apply Changes button behavior is not correct when configure interfaces on nodes with different bonds

[Kate Pimenova]

Steps to reproduce:
Add two node with same number of interfaces,
then bond network interfaces on one of this nodes, apply change
then configure interfaces on both nodes at the same time, click apply changes button.

expected behavior: changes saved, apply button disabled
observed behaviour: changes actually saved, but apply button is still active and discard changes dialog is shown in case of try to go to another tab.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/259335

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/259335
Committed: https://git.openstack.org/cgit/openstack/fuel-web/commit/?id=fb37ec8aa7b5055c84a02a09352749f67a99601d
Submitter: Jenkins
Branch: master

commit fb37ec8aa7b5055c84a02a09352749f67a99601d
Author: Julia Aranovich <email address hidden>
Date: Fri Dec 18 11:51:34 2015 +0300

    Fix changes calculation on node interface configuration screen

    Closes-Bug: #1526866

    Change-Id: Id994aef79a3cd25dbfca489365bf18179240da59

[Anastasia Palkina (apalkina)]

Verified on ISO #327

VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "8.0"
  api: "1.0"
  build_number: "327"
  build_id: "327"
  fuel-nailgun_sha: "ec25ae8df28e1f1d87da653c5aab2711dff729f6"
  python-fuelclient_sha: "7c7a756fb6a3d091851c060003a2965c67aa353d"
  fuel-agent_sha: "d354cbe61b055db848a15ce66fb7ae92178d2c0a"
  fuel-nailgun-agent_sha: "a33a58d378c117c0f509b0e7badc6f0910364154"
  astute_sha: "c56dfde2da034151a7e707b381c4cf9d213b4ba2"
  fuel-library_sha: "bcc3d042a47547f6ad826360a85ef21dcaf25882"
  fuel-ostf_sha: "b2ebf15a3530b5c7b57707acf8642c1c3ac71bd8"
  fuel-mirror_sha: "8100acb3a566358d0d4ecc66de32d39626263028"
  fuelmenu_sha: "2942a85796d37f09ba8c8c6d762d8813292cf0d4"
  shotgun_sha: "cacb93cbc28910ff0dc38f30a855efa9af50d8ce"
  network-checker_sha: "d443ef47abeda58d319bc8d33d5005dd09440a02"
  fuel-upgrade_sha: "718aa3d7021fee2970f0fa6791cf5188578cc516"
  fuelmain_sha: "3faa824728ce60734abe602ff3778976f8a16eed"