Fuel UI show incorrect message and link on DNS servers validation

[Maksim Malchuk]

Detailed bug description:

When incorrect settings passed to the Fuel installation GUI shows the incorrect message and hyperlink on DNS servers validation.

Steps to reproduce:

Install the Fuel master with "DNS_UPSTREAM": "172.18.80.136,2601:646:8700:4519:3636:3bff:feb9:73e3" for example in the /etc/fuel/astute.yaml.

Expected results:
1. The Dashboard should show "Networking setting are invalid" and link to the Networking tab.

Actual result:
1. The Dashboard show the message "Environment settings are invalid. For more information please visit the Settings tab."

[Maksim Malchuk (mmalchuk)]

The correct Settings tab without any error.

[Maksim Malchuk (mmalchuk)]

The Networks tab with an error.

[Maksim Malchuk (mmalchuk)]

https://bugs.launchpad.net/fuel/+bug/1553568
Another bug which causes this problem.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/301056

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/301056
Committed: https://git.openstack.org/cgit/openstack/fuel-ui/commit/?id=b37635d31fdac8c2493c2b38fc9faee111fc8b15
Submitter: Jenkins
Branch: master

commit b37635d31fdac8c2493c2b38fc9faee111fc8b15
Author: Julia Aranovich <email address hidden>
Date: Mon Apr 4 14:20:35 2016 +0300

    Fix invalid environment settings processing on Dashboard

    Network related environment settings are located on Networks tab
    separately from other settings which are on Settings tab.
    Dashboard warnings need to take this into account to redirect
    User properly to an appropriate environment tab.

    Also, calculation of possibility of data saving is fixed for Networks tab
    not to take into account settings from Settings tab.

    Closes-Bug: #1555337

    Change-Id: I8c44a51dea5b426e58381f1c1b7d305432d73ecb