Fixed issue rapid7#7689, count of found users not accurate

In module drupal_views_user_enum, the count of found users is not accurate.
Fixed it by doing flatten before doing counting.

Author: jinq102030

modules/auxiliary/scanner/http/drupal_views_user_enum.rb

@@ -126,9 +126,9 @@ def run_host(ip)
         return
       end
     end
-
+    results = results.flatten.uniq
     print_status("Done. #{results.length} usernames found...")
-    results.flatten.uniq.each do |user|
+    results.each do |user|
       print_good("Found User: #{user}")
 
       report_cred(