[6.14.z] add orgnization option for virt-who configuration UI page

[Satellite-QE]

Cherrypick of PR: #863

when create a virt-who config without chose the organization, the organization option will display on the virt-who configuration UI page
Case PASS

(robottelo_vv) [virtwho@dell-per740-68-vm-04 robottelo]$ pytest ./tests/foreman/virtwho/ui/test_esx.py -k test_positive_organization_id_option --disable-pytest-warnings -q
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1 passed, 35 deselected, 5 warnings in 128.66s (0:02:08)