Merge branch 'ee-parity' into 'master'

Add method missing from EE ## Why was this MR needed? `ProjectWiki#repository_exists?` is present in EE but not on CE, and there's no particular reason why it shouldn't See merge request !5802

Merge branch 'ee-parity' into 'master'
640e485c · Robert Speicher · 06e3bb9f · 60aee5b7 · 640e485c
Commit 640e485c authored Aug 15, 2016 by Robert Speicher
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project_wiki.rb app/models/project_wiki.rb +4 -0

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--- a/app/models/project_wiki.rb
+++ b/app/models/project_wiki.rb
@@ -56,6 +56,10 @@ class ProjectWiki
    end
  end

+  def repository_exists?
+    !!repository.exists?
+  end
+
  def empty?
    pages.empty?
  end