Please review: [389 Project] #502: setup-ds.pl script should wait if "semanage.trans.LOCK" present

[Noriko Hosoi]

https://fedorahosted.org/389/ticket/502

https://fedorahosted.org/389/attachment/ticket/502/0001-Ticket-502-setup-ds....

Bug description: If multiple DSCreate or removeDSInstance run
  simultaneously, semanage port fails because only one semanage
  transaction is allowed to start.

Fix description: This patch puts "semanage port" in the while
  loop and it retries until it succeeds or reaches the max retry
  count (in total 5 minutes).