Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1120181
Description of problem:
I was trying boundary test and input a name of 255 characters and got an error on UI:

PGError: ERROR: value too long for type character varying(255) : INSERT INTO "audits" ("action", "associated_id", "associated_name", "associated_type", "auditable_id", "auditable_name", "auditable_type", "audited_changes", "comment", "created_at", "remote_address", "user_id", "user_type", "username", "version") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15) RETURNING "id"

Version-Release number of selected component (if applicable):

• candlepin-0.9.19-1.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-0.9.19-1.el6_5.noarch
• candlepin-tomcat6-0.9.19-1.el6_5.noarch
• elasticsearch-0.90.10-4.el6sat.noarch
• foreman-1.6.0.21-1.el6sat.noarch
• foreman-compute-1.6.0.21-1.el6sat.noarch
• foreman-gce-1.6.0.21-1.el6sat.noarch
• foreman-libvirt-1.6.0.21-1.el6sat.noarch
• foreman-ovirt-1.6.0.21-1.el6sat.noarch
• foreman-postgresql-1.6.0.21-1.el6sat.noarch
• foreman-proxy-1.6.0.9-1.el6sat.noarch
• foreman-selinux-1.6.0-5.el6sat.noarch
• foreman-vmware-1.6.0.21-1.el6sat.noarch
• katello-1.5.0-26.el6sat.noarch
• katello-ca-1.0-1.noarch
• katello-certs-tools-1.5.5-1.el6sat.noarch
• katello-installer-0.0.53-1.el6sat.noarch
• openldap-2.4.23-32.el6_4.1.x86_64
• pulp-katello-0.3-3.el6sat.noarch
• pulp-nodes-common-2.4.0-0.23.beta.el6sat.noarch
• pulp-nodes-parent-2.4.0-0.23.beta.el6sat.noarch
• pulp-puppet-plugins-2.4.0-0.23.beta.el6sat.noarch
• pulp-puppet-tools-2.4.0-0.23.beta.el6sat.noarch
• pulp-rpm-plugins-2.4.0-0.23.beta.el6sat.noarch
• pulp-selinux-2.4.0-0.23.beta.el6sat.noarch
• pulp-server-2.4.0-0.23.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
• rubygem-hammer_cli-0.1.1-5.el6sat.noarch
• rubygem-hammer_cli_foreman-0.1.1-9.el6sat.noarch
• rubygem-hammer_cli_foreman_tasks-0.0.3-2.el6sat.noarch
• rubygem-hammer_cli_katello-0.0.4-7.el6sat.noarch

How reproducible:
always

Steps to Reproduce:
1. create OS with 255 characters in name
2.
3.

Actual results:
PGError: ERROR: value too long for type character varying(255) : INSERT INTO "audits" ("action", "associated_id", "associated_name", "associated_type", "auditable_id", "auditable_name", "auditable_type", "audited_changes", "comment", "created_at", "remote_address", "user_id", "user_type", "username", "version") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15) RETURNING "id"

Expected results:
A proper validation error should be raised with characters limit if limit exceeds 255 char.

Additional info:

production.log:

Processing by OperatingsystemsController#create as */*
Parameters: {"utf8"=>"✓", "search"=>"", "authenticity_token"=>"clydbCf5GuLU0YIYbdglJJVF0MSJYDNyvaeibEvu9Tw=", "operatingsystem"=>{"name"=>"yodWSsEDLYtoNf21xwtCJPZOYHm4qDCMyf4ogBe0Kxs7tQyxzaJuOn3F6EUwy6WnVaIoB0wVOSDX3fMgmMqkeMl9pzlPGep343XaMX7W35roCJXRPuEROmuANs8Ajxipetk93FnbDyTSR4zClj0lt9dcmEppe3a9Tdzm9b5aNEyNSdO2GFIKcFqgwX8qKFaNAGsl5qe2ULHVvJEhPyOQKNs6iBbhJxZP9qF9LtB2aHjKerX4cTCsUZoNLp8aR5M", "major"=>"2", "minor"=>"5", "description"=>"", "family"=>"Redhat", "release_name"=>"", "architecture_ids"=>["2", "", "", ""], "ptable_ids"=>[""], "medium_ids"=>[""]}}
Operation FAILED: PGError: ERROR: value too long for type character varying(255)
: INSERT INTO "audits" ("action", "associated_id", "associated_name", "associated_type", "auditable_id", "auditable_name", "auditable_type", "audited_changes", "comment", "created_at", "remote_address", "user_id", "user_type", "username", "version") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15) RETURNING "id"
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