Add parent relationship for physical server textual summary

[gabrielsvinha]

This Pull Request adds the parent provider relationship for the PhysicalServer#show page summary. Showing the Ems relative to its parent.

In the example above, the EmsPhysicalInfra name is Lenovo and is shown below the host label.

[AparnaKarve]

Add this to the #show spec which should address the spec failure:

ems = FactoryGirl.create(:ems_physical_infra)
physical_server = FactoryGirl.create(:physical_server, :computer_system => computer_system, :ems_id => ems.id)

[miq-bot]

Checked commits gabrielsvinha/manageiq-ui-classic@59e9e86~...7e29169 with ruby 2.2.6, rubocop 0.47.1, and haml-lint 0.20.0
2 files checked, 0 offenses detected
Everything looks fine. 👍

[AparnaKarve]

LGTM

@dclarizio OK to merge.