Merge branch '25324-change-housekeeping-btn-to-default' into 'master'

Use default btn styling for Housekeeping button on projects settings page

Changes the Housekeeping button styling on the project settings page from ```btn-save``` to ```btn-default```

**BEFORE:** ![Screen_Shot_2016-12-06_at_12_51_42_PM](/uploads/1b1c8a26eead025062e2c98d9d0f4286/Screen_Shot_2016-12-06_at_12_51_42_PM.png)

**AFTER:** ![Screen_Shot_2016-12-06_at_12_51_57_PM](/uploads/9e7937af4a058fa1aa8b45653dbad3ee/Screen_Shot_2016-12-06_at_12_51_57_PM.png)

Closes #25324 
cc: @awhildy

See merge request !7959

app/views/projects/edit.html.haml

@@ -146,7 +146,7 @@
           such as compressing file revisions and removing unreachable objects.
     .col-lg-9
       = link_to 'Housekeeping', housekeeping_namespace_project_path(@project.namespace, @project),
-          method: :post, class: "btn btn-save"
+          method: :post, class: "btn btn-default"
   %hr
   .row.prepend-top-default
     .col-lg-3

changelogs/unreleased/25324-change-housekeeping-btn-to-default.yml

+---
+title: Changed Housekeeping button on project settings page to default styling
+merge_request: 
+author: Ryan Harris