kibana.defaultAppId for valid app but with specific role creates endless redirect loop

[ajoliveira]

Kibana version: 7.4.2

Elasticsearch version: 7.4.2

Server OS version: macOS Mojave 10.14.6

Browser version: Version 78.0.3904.108 (Official Build) (64-bit)

Browser OS version: macOS Mojave 10.14.6

Original install method (e.g. download page, yum, from source, etc.): tar.gz

Describe the bug: Related to #49495 ...
Since we are deprecating the kibana_dashboard_only_user role, if you create your own dashboard only user role via privileges as recommended, and have a valid defaultAppId value set:
kibana.defaultAppId: "discover"

You still end up in a situation where the browser loops after logging in and you can never get to your dashboards.

Steps to reproduce:

1. Create role for user that limits them to dashboard/canvas, etc.

# GET _security/role/my_dashboard_only
{
  "my_dashboard_only" : {
    "cluster" : [ ],
    "indices" : [ ],
    "applications" : [
      {
        "application" : "kibana-.kibana",
        "privileges" : [
          "feature_dashboard.read",
          "feature_canvas.read"
        ],
        "resources" : [
          "space:default"
        ]
      }
    ],
    "run_as" : [ ],
    "metadata" : { },
    "transient_metadata" : {
      "enabled" : true
    }
  }
}

2. Assign role to user(s) with any other roles for specific indices, etc.
3. Login as user with this my_dashboard_only role, browser will continuously loop

Expected behavior: User should be able to view Canvas/Dasboards as defined in role and not be routed to 'discover' plugin.

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[stratoula]

As we removed defaultAppId here #109798 I am closing it