Fix project atts directory deletion to delete base directory too.

services/git-bridge/src/main/java/uk/ac/ic/wlgitbridge/util/Util.java

@@ -131,6 +131,11 @@ public class Util {
         t.printStackTrace();
     }
 
+    public static void deleteDirectory(File directory) {
+        deleteInDirectory(directory);
+        directory.delete();
+    }
+
     public static void deleteInDirectory(File directory) {
         deleteInDirectoryApartFrom(directory);
     }

services/git-bridge/src/main/java/uk/ac/ic/wlgitbridge/writelatex/CandidateSnapshot.java

@@ -67,7 +67,7 @@ public class CandidateSnapshot {
 
     public void deleteServletFiles() throws IOException {
         if (attsDirectory != null) {
-            Util.deleteInDirectory(attsDirectory);
+            Util.deleteDirectory(attsDirectory);
         }
     }