Default Permissions for Entity Creator

[TanmoySG]

Creator of a Database currently needs to be granted role with permissions on the created Database, for the user to be able to use the database.

In this Feature, "default" role for "database-admin" with relevant permissions will be added (just like wdb-super-admin) and when a user will create an entity the "entity-admin" (currently only database-admin) will be granted by default and no explicit request would be required to grant the creator with custom admin role.

• [x] Design
• [x] What permissions go in the admin role?
• [x] Code changes to grant role, on entity (currently database) creation

[TanmoySG]

database-admin system role

Privileges granted through this role

• GrantRole
• ReadDatabase
• DeleteDatabase
• UpdateDatabase
• CreateCollection

Requires username-password for same