Rename method for checking tags in container repository

This is important because method `empty?` is triggered when validation
happens, and we don't want to make API request to registry when record
is validated.

app/models/container_repository.rb

@@ -42,6 +42,12 @@ class ContainerRepository < ActiveRecord::Base
     ContainerRegistry::Blob.new(self, config)
   end
+  # TODO, specs needed
+  #
+  def has_tags?
+    tags.any?
+  end
+
   # TODO, add bang to this method
   #
   def delete_tags
@@ -53,12 +59,6 @@ class ContainerRepository < ActiveRecord::Base
     end
   end
-  # TODO, specs needed
-  #
-  def empty?
-    tags.none?
-  end
-
   # TODO, we will return a new ContainerRepository object here
   #
   def self.project_from_path(repository_path)