[zanata/zanata-server] 1beca8: fix(admin role): fix removing role exception

[GitHub]

  Branch: refs/heads/ZNTA-1278
  Home:   https://github.com/zanata/zanata-server
  Commit: 1beca8742640d58384b59a100a7e7c7a15d2c2e5
      https://github.com/zanata/zanata-server/commit/1beca8742640d58384b59a100a7e7c7a15d2c2e5
  Author: Alex Eng <aeng at redhat.com>
  Date:   2016-07-29 (Fri, 29 Jul 2016)

  Changed paths:
    M zanata-war/src/main/webapp/admin/rolemanager.xhtml

  Log Message:
  -----------
  fix(admin role): fix removing role exception