Hide retry import form for non masters

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/projects/import.html.haml

@@ -15,15 +15,16 @@
       %h2
         Import failed. Retry?
   %hr
-  = form_for @project, url: retry_import_project_path(@project), method: :put, html: { class: 'form-horizontal' } do |f|
-    .form-group.import-url-data
-      = f.label :import_url, class: 'control-label' do
-        %span Import existing repo
-      .col-sm-10
-        = f.text_field :import_url, class: 'form-control', placeholder: 'https://github.com/randx/six.git'
-        .bs-callout.bs-callout-info
-          This url must be publicly accessible or you can add a username and password like this: https://username:password@gitlab.com/company/project.git.
-          %br
-          The import will time out after 2 minutes. For big repositories, use a clone/push combination.
-    .form-actions
-      = f.submit 'Retry import', class: "btn btn-create", tabindex: 4
+  - if can?(current_user, :admin_project, @project)
+    = form_for @project, url: retry_import_project_path(@project), method: :put, html: { class: 'form-horizontal' } do |f|
+      .form-group.import-url-data
+        = f.label :import_url, class: 'control-label' do
+          %span Import existing repo
+        .col-sm-10
+          = f.text_field :import_url, class: 'form-control', placeholder: 'https://github.com/randx/six.git'
+          .bs-callout.bs-callout-info
+            This url must be publicly accessible or you can add a username and password like this: https://username:password@gitlab.com/company/project.git.
+            %br
+            The import will time out after 2 minutes. For big repositories, use a clone/push combination.
+      .form-actions
+        = f.submit 'Retry import', class: "btn btn-create", tabindex: 4