Added ability to create default dashboard for group

[yrudman]

BEFORE: We have one default dashboards (supplied with installation).
This dashboard defined in product/dashboard/dashboards/default.yaml

AFTER: ability to supply group specific default dashboard.

TESTING creating dashboard for group EvmGroup-support with the same set of widgets as existing default dashboard:

• copy product/dashboard/dashboards/default.yaml to product/dashboard/dashboards/some_file.yaml
• edit some_file.yaml by changing name: and description: and adding owner_type: MiqGroup and owner_description: EvmGroup-support. It will look like:

name: Default for Support
read_only: t
set_type: MiqWidgetSet
description: Default Dashboard for Support group
owner_type: MiqGroup
owner_description: EvmGroup-support
set_data_by_description:
  :col1:
  - chart_vendor_and_guest_os
  - rss_newest_hosts
  - report_top_memory_consumers_weekly
  :col2:
  - report_top_cpu_consumers_weekly
  - chart_virtual_infrastructure_platforms
  :col3:
  - chart_guest_os_information_any_os
  - rss_newest_vms
  - report_top_storage_consumers

Executing MiqWidgetSet.seed from Rails console will add new dashboard for EvmGroup-support

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1610299

@miq-bot add-label enhancement, reporting

\cc @gtanzillo

[gtanzillo]

LGTM 👍

[miq-bot]

Checked commits yrudman/manageiq@c8c8277~...a82d6a1 with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
2 files checked, 0 offenses detected
Everything looks fine. 👍

[yrudman]

@jrafanie could you review

[jrafanie]

👍