Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1188435
Description of problem:
Creating a Compute Resource works and control of existing VM's is working, when trying to add a compute profile we get an error.

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

candlepin-0.9.23.1-1.el6.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-0.9.23.1-1.el6.noarch
    candlepin-tomcat6-0.9.23.1-1.el6.noarch
    elasticsearch-0.90.10-6.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-0.0.67-1.el6sat.noarch
    katello-server-ca-1.0-1.noarch
    katello.croberts.org-apache-1.0-1.noarch
    katello.croberts.org-foreman-client-1.0-1.noarch
    katello.croberts.org-foreman-proxy-1.0-1.noarch
    katello.croberts.org-parent-cert-1.0-1.noarch
    katello.croberts.org-puppet-client-1.0-1.noarch
    katello.croberts.org-qpid-broker-1.0-1.noarch
    katello.croberts.org-qpid-client-cert-1.0-1.noarch
    mod_wsgi-3.4-1.pulp.el6sat.x86_64
    pulp-katello-0.3-4.el6sat.noarch
    pulp-nodes-common-2.4.4-1.el6sat.noarch
    pulp-nodes-parent-2.4.4-1.el6sat.noarch
    pulp-puppet-plugins-2.4.4-1.el6sat.noarch
    pulp-puppet-tools-2.4.4-1.el6sat.noarch
    pulp-rpm-plugins-2.4.4-1.1.el6sat.noarch
    pulp-selinux-2.4.4-1.el6sat.noarch
    pulp-server-2.4.4-1.el6sat.noarch
    python-gofer-qpid-1.3.0-1.el6sat.noarch
    python-isodate-0.5.0-1.pulp.el6sat.noarch
    python-kombu-3.0.15-12.pulp.el6sat.noarch
    python-pulp-bindings-2.4.4-1.el6sat.noarch
    python-pulp-common-2.4.4-1.el6sat.noarch
    python-pulp-puppet-common-2.4.4-1.el6sat.noarch
    python-pulp-rpm-common-2.4.4-1.1.el6sat.noarch
    python-qpid-0.22-14.el6sat.noarch
    python-qpid-qmf-0.22-37.el6.x86_64
    qpid-cpp-client-0.22-42.el6.x86_64
    qpid-cpp-server-0.22-42.el6.x86_64
    qpid-cpp-server-linearstore-0.22-42.el6.x86_64
    qpid-java-client-0.22-6.el6.noarch
    qpid-java-common-0.22-6.el6.noarch
    qpid-proton-c-0.7-1.el6.x86_64
    qpid-qmf-0.22-37.el6.x86_64
    qpid-tools-0.22-12.el6.noarch
    ruby193-rubygem-katello-1.5.0-93.el6sat.noarch
    rubygem-hammer_cli_katello-0.0.4-14.el6sat.noarch
    rubygem-smart_proxy_pulp-1.0.1-1.1.el6sat.noarch

How reproducible:

Steps to reproduce:
*Infrastructure > compute profiles
*Create a new compute profile
*Select the compute resource
*Get an undefinded method error:

Actual results:

NoMethodError
undefined method `[]' for nil:NilClass
app/helpers/layout_helper.rb:119:in `block in selectable_f'
app/helpers/layout_helper.rb:160:in `block (3 levels) in field'
app/helpers/layout_helper.rb:159:in `block (2 levels) in field'
app/helpers/layout_helper.rb:150:in `block in field'
app/helpers/layout_helper.rb:149:in `field'
app/helpers/layout_helper.rb:117:in `selectable_f'
app/views/compute_resources_vms/form/_vmware.html.erb:6:in `_app_views_compute_resources_vms_form__vmware_html_erb__1234955438304079943_85954960'
app/views/compute_attributes/_form.html.erb:10:in `block (2 levels) in app_views_compute_attributes_form_html_erb__2956532270157352589_118689300'
app/views/compute_attributes/_form.html.erb:8:in `block in app_views_compute_attributes_form_html_erb__2956532270157352589_118689300'
app/helpers/layout_helper.rb:251:in `form_for'
app/views/compute_attributes/_form.html.erb:2:in `_app_views_compute_attributes__form_html_erb__2956532270157352589_118689300'
app/views/compute_attributes/new.html.erb:3:in `_app_views_compute_attributes_new_html_erb__4379414151464736042_111683820'
app/models/concerns/foreman/thread_session.rb:33:in `clear_thread'
lib/middleware/catch_json_parse_errors.rb:9:in `call'

Expected results:
To be able to provision vm's or add compute resources. I tested this internally with VMWare 5.1 and it worked fine for our Pune Lab. I checked on Mojo and I do not see anything higher than 5.1

Additional info:

VM Ware 5.5