Reorganize and sort models and managers according to Mayan's best practices.

Signed-off-by: Michael Price <loneviking72@gmail.com>

mayan/apps/django_gpg/models.py

@@ -61,6 +61,9 @@ class Key(models.Model):
         verbose_name = _('Key')
         verbose_name_plural = _('Keys')
 
+    def __str__(self):
+        return '{} - {}'.format(self.key_id, self.user_id)
+
     def clean(self):
         import_results = gpg_backend.import_key(key_data=self.key_data)
 
@@ -93,9 +96,6 @@ class Key(models.Model):
 
         super(Key, self).save(*args, **kwargs)
 
-    def __str__(self):
-        return '{} - {}'.format(self.key_id, self.user_id)
-
     def sign_file(self, file_object, passphrase=None, clearsign=False, detached=False, binary=False, output=None):
         # WARNING: using clearsign=True and subsequent decryption corrupts the
         # file. Appears to be a problem in python-gnupg or gpg itself.