Changing of model's verbose_name does not change the names of the model's permissions

[Dmitry Burakov]

I've found that changing the "verbose_name" of the Meta class of a model and than running migrations does not change the names of the model's permissions.

Steps to reproduce:

1. Create a new model

class AwesomeModel(models.Model):
    class Meta:
        verbose_name = "My awesome model"

2. Run "makemigrations" and than "migrate"
3. Look at the generated permissions

select * from auth_permission;
 id  |                  name                  | content_type_id |             codename
-----+----------------------------------------+-----------------+----------------------------------
   1 | Can add my awesome model               |               2 | add_awesomemodel
   2 | Can change my awesome model            |               2 | change_awesomemodel
   3 | Can delete my awesome model            |               2 | delete_awesomemodel

4. Change the "verbose_name" of the Meta class of the model

class AwesomeModel(models.Model):
    class Meta:
        verbose_name = "My really awesome model"

5. Run "makemigrations" and than "migrate" again
6. Look at the generated permissions agaun

select * from auth_permission;
 id  |                  name                  | content_type_id |             codename
-----+----------------------------------------+-----------------+----------------------------------
   1 | Can add my awesome model               |               2 | add_awesomemodel
   2 | Can change my awesome model            |               2 | change_awesomemodel
   3 | Can delete my awesome model            |               2 | delete_awesomemodel

As you can see the names of the model's permissions are not changed.
But! If now you drop the database and apply all the migrations to the empty database - the permissions will have correct names

select * from auth_permission;
 id  |                  name                  | content_type_id |             codename
-----+----------------------------------------+-----------------+----------------------------------
   1 | Can add my really awesome model        |               2 | add_awesomemodel
   2 | Can change really my awesome model     |               2 | change_awesomemodel
   3 | Can delete really my awesome model     |               2 | delete_awesomemodel