[zanata/zanata-server] 4c8873: Update username regular expression:

[GitHub]

  Branch: refs/heads/rhbz981498
  Home:   https://github.com/zanata/zanata-server
  Commit: 4c8873914c4012ce69158ee7a2fdef893f4a650e
      https://github.com/zanata/zanata-server/commit/4c8873914c4012ce69158ee7a2fdef893f4a650e
  Author: Alex Eng <aeng at redhat.com>
  Date:   2015-06-01 (Mon, 01 Jun 2015)

  Changed paths:
    M docs/release-notes.md
    M zanata-war/src/main/java/org/zanata/action/RegisterAction.java

  Log Message:
  -----------
  Update username regular expression:

https://bugzilla.redhat.com/show_bug.cgi?id=981498