Delete ProjectImportData record only if Project is not a mirror.

* This fix ensure we always use the full import URL when syncing the
mirror.
* Refactor method name.

app/models/project.rb

@@ -269,7 +269,7 @@ class Project < ActiveRecord::Base
     state :failed
 
     after_transition any => :started, do: :schedule_add_import_job
-    after_transition any => :finished, do: :clear_import_data
+    after_transition any => :finished, do: :reset_cache_and_import_attrs
 
     after_transition started: :finished do |project, transaction|
       if project.mirror?
@@ -453,12 +453,12 @@ class Project < ActiveRecord::Base
     end
   end
 
-  def clear_import_data
+  def reset_cache_and_import_attrs
     update(import_error: nil)
 
     ProjectCacheWorker.perform_async(self.id)
 
-    self.import_data.destroy if self.import_data
+    self.import_data.destroy if !mirror? && import_data
   end
 
   def import_url=(value)

spec/models/project_spec.rb

@@ -894,4 +894,27 @@ describe Project, models: true do
       end
     end
   end
+
+  describe 'handling import URL' do
+    context 'when project is a mirror' do
+      it 'returns the full URL' do
+        project = create(:project, :mirror, import_url: 'http://user:pass@test.com')
+
+        project.import_finish
+
+        expect(project.reload.import_url).to eq('http://user:pass@test.com')
+      end
+    end
+
+    context 'when project is not a mirror' do
+      it 'returns the sanitized URL' do
+        project = create(:project, import_status: 'started', import_url: 'http://user:pass@test.com')
+
+        project.import_finish
+
+        expect(project.reload.import_url).to eq('http://test.com')
+      end
+    end
+
+  end
 end