Disable turbolinks when linking to Bitbucket import status

Turbolinks was causing issues with the Bitbucket Javascript/display because it
was trying to intercept /import/bitbucket/status even when a 302 redirection occured.

Closes #2241

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 v 7.14.0 (unreleased)
+  - Disable turbolinks when linking to Bitbucket import status (Stan Hu)
   - Fix corrupted binary files when using API files endpoint (Stan Hu)
   - Show incompatible projects in Bitbucket import status (Stan Hu)
   - Fix coloring of diffs on MR Discussion-tab (Gert Goet)

app/views/import/bitbucket/status.html.haml

@@ -61,7 +61,7 @@
     rather than Git. Please convert
     = link_to "them to Git,", "https://www.atlassian.com/git/tutorials/migrating-overview"
     and go through the
-    = link_to "import flow", status_import_bitbucket_path
+    = link_to "import flow", status_import_bitbucket_path, "data-no-turbolink" => "true"
     again.

app/views/projects/new.html.haml

@@ -40,7 +40,7 @@
             - if bitbucket_import_enabled?
-              = link_to status_import_bitbucket_path, class: 'btn' do
+              = link_to status_import_bitbucket_path, class: 'btn', "data-no-turbolink" => "true" do
                 %i.fa.fa-bitbucket
                 Bitbucket
             - else