ServiceForm spec - fix by disabling disableSubmit and making sure the validator can pass

[himdel]

fixes

    ✕ should enable submit button and call submit callback (30ms)

  ● Cloud tenant form component › should enable submit button and call submit callback

    expect(jest.fn()).toHaveBeenCalledWith(expected)

    Expected mock function to have been called with:
      {"description": "bar", "name": "foo"} as argument 2, but it was called with {"description": "bar", "name": "bar"}.

Introduced in #4985.
Cc @Hyperkid123 , @martinpovolny

[himdel]

This also makes it possible to submit the Service form on changes.

[miq-bot]

Checked commits https://github.com/himdel/manageiq-ui-classic/compare/cd79859f50658dd69c88e66ca1f9333c04d1f89b~...e125d9503a98a2169680e2d74c7640e14523778d with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
0 files checked, 0 offenses detected
Everything looks fine. ⭐

[himdel]

(Verified I can now save in both the #4985 Service form, and in #4895 Cloud Tenant form, so hopefully that disableSubmit was just a testing artifact.)