Fuel UI becomes unavailable after disabling a plugin which provides roles

[Vitaly Kramskikh]

STR:
1. Install a plugin which provides roles
2. Create an env
3. Enable the plugin
4. Add plugin role to a node
5. Disable the plugin

Expected result:
1. It is not possible to disable the plugin

Actual result:
1. Plugin is disableable, Fuel UI becomes unavailable after disabling the plugin

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/211674

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/211928

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/211928
Committed: https://git.openstack.org/cgit/stackforge/fuel-web/commit/?id=868914192f3625d5be9176f6b2d7fef9ec7ecabf
Submitter: Jenkins
Branch: master

commit 868914192f3625d5be9176f6b2d7fef9ec7ecabf
Author: Julia Aranovich <email address hidden>
Date: Wed Aug 12 12:28:27 2015 +0300

    Fix handling of toggleable group dependencies

    * dependent role or settings don't block the whole group
    * fixed setting group tooltip icon layout

    Closes-Bug: #1484049

    Related-Bug: #1483633

    Change-Id: I78a55ecbb589dda64a803af04e546c1add87f313

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/211674
Committed: https://git.openstack.org/cgit/stackforge/fuel-web/commit/?id=60d4ddaaa4f6add04e397c3155e53200ce449d07
Submitter: Jenkins
Branch: master

commit 60d4ddaaa4f6add04e397c3155e53200ce449d07
Author: Vitaly Kramskikh <email address hidden>
Date: Tue Aug 11 19:55:39 2015 +0300

    Disallow disabling plugins which roles are used

    This achieved by adding a new restriction for plugin-provided
    roles which prevents plugin to be disabled if env contains
    nodes with plugin-provided roles

    Closes-Bug: #1483633

    Change-Id: I8e2502df2a9d84934730bc4681fc3c295fac450a

[Liubov Efremova (lefremova)]

Verified on fuel-7.0-241-2015-08-27_03-02-45.iso