Land rapid7#6949, hash fix for filezilla_client_cred

Author: wvu

modules/post/multi/gather/filezilla_client_cred.rb

@@ -120,7 +120,7 @@ def report_cred(opts)
       origin_type: :session,
       private_data: opts[:password],
       private_type: :password,
-      username: opts[:user]
+      username: opts[:username]
     }.merge(service_data)
 
     login_data = {