[zanata/zanata-platform] 5fb721: Fix incorrect exception

[GitHub]

  Branch: refs/heads/fix-auto-join-fields
  Home:   https://github.com/zanata/zanata-platform
  Commit: 5fb721ced0c856c2eed8a70633f6a4c6a2d23047
      https://github.com/zanata/zanata-platform/commit/5fb721ced0c856c2eed8a70633f6a4c6a2d23047
  Author: Damian Jansen <djansen at redhat.com>
  Date:   2017-04-03 (Mon, 03 Apr 2017)

  Changed paths:
    M server/zanata-war/src/main/java/org/zanata/action/LanguageAction.java

  Log Message:
  -----------
  Fix incorrect exception