Update access control unittest

Fixes issues:
[#151](https://github.com/RedHatQE/cfme_pages/issues/151)
[#145](https://github.com/RedHatQE/cfme_pages/issues/145)
[#144](https://github.com/RedHatQE/cfme_pages/issues/144)
[#143](https://github.com/RedHatQE/cfme_pages/issues/143)
[#142](https://github.com/RedHatQE/cfme_pages/issues/142)
[#141](https://github.com/RedHatQE/cfme_pages/issues/141)
[#139](https://github.com/RedHatQE/cfme_pages/issues/139)