Add Entity Group Field module

Problem/Motivation

#2829632: How can I create a view listing all groups that a user belong to?
#2715285: show group memberships on a user account tab
#2813405: Add a field to view and edit content's groups

This patch #2813405: Add a field to view and edit content's groups, which creates a field in the entity types from Group Content Plugins, to get this result just enable the submodule from the patch and then got to "Manage Display" for users and configure the "Group Content" field formatter as needed.

Proposed resolution

Add Entity Group Field module to Vardoc
https://www.drupal.org/project/entitygroupfield

Entity Group Field provides a computed field that can be configured on any entity types that are associated with Groups

User interface changes

• None

API changes

• Be able to filter in views

Data model changes

• Computed fields