Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1144162
Description of problem:
The server returns an HTTP 422 response when creating a user if UTF-8 characters are provided for that user's login, firstname or lastname. Note that other types of interesting characters are allowed, such as latin-1 and CJK.

Version-Release number of selected component (if applicable):
The following software is installed:

• apr-util-ldap-1.3.9-3.el6_0.1.x86_64
• candlepin-0.9.23-1.el6_5.noarch
• candlepin-common-1.0.1-1.el6_5.noarch
• candlepin-scl-1-5.el6_4.noarch
• candlepin-scl-quartz-2.1.5-5.el6_4.noarch
• candlepin-scl-rhino-1.7R3-1.el6_4.noarch
• candlepin-scl-runtime-1-5.el6_4.noarch
• candlepin-selinux-0.9.23-1.el6_5.noarch
• candlepin-tomcat6-0.9.23-1.el6_5.noarch
• elasticsearch-0.90.10-6.el6sat.noarch
• foreman-1.6.0.46-1.el6sat.noarch
• foreman-compute-1.6.0.46-1.el6sat.noarch
• foreman-gce-1.6.0.46-1.el6sat.noarch
• foreman-libvirt-1.6.0.46-1.el6sat.noarch
• foreman-ovirt-1.6.0.46-1.el6sat.noarch
• foreman-postgresql-1.6.0.46-1.el6sat.noarch
• foreman-proxy-1.6.0.30-1.el6sat.noarch
• foreman-selinux-1.6.0.14-1.el6sat.noarch
• foreman-vmware-1.6.0.46-1.el6sat.noarch
• katello-1.5.0-30.el6sat.noarch
• katello-certs-tools-1.5.6-1.el6sat.noarch
• katello-default-ca-1.0-1.noarch
• katello-installer-0.0.64-1.el6sat.noarch
• katello-server-ca-1.0-1.noarch
• openldap-2.4.23-32.el6_4.1.x86_64
• pulp-katello-0.3-4.el6sat.noarch
• pulp-nodes-common-2.4.1-0.7.beta.el6sat.noarch
• pulp-nodes-parent-2.4.1-0.7.beta.el6sat.noarch
• pulp-puppet-plugins-2.4.1-0.7.beta.el6sat.noarch
• pulp-puppet-tools-2.4.1-0.7.beta.el6sat.noarch
• pulp-rpm-plugins-2.4.1-0.7.beta.el6sat.noarch
• pulp-selinux-2.4.1-0.7.beta.el6sat.noarch
• pulp-server-2.4.1-0.7.beta.el6sat.noarch
• python-ldap-2.3.10-1.el6.x86_64
• ruby193-rubygem-net-ldap-0.3.1-3.el6sat.noarch
• ruby193-rubygem-runcible-1.1.0-2.el6sat.noarch

How reproducible:
Almost always.

Steps to Reproduce:
1. Create a user via the API. Provide any number of UTF-8 characters as a login, firstname or lastname.

Actual results:
HTTP 422 response with one of the following messages:

• First name is invalid
• Last name is invalid
• Surname is invalid

Expected results:
One of the following:

• A user is created.
• A helpful error message is returned.

Additional info:
Once in a while - say, once every 20 attempts - a user is sucessfully created even though UTF-8 chars are submitted.