Add support for non-ascii fields in settings.

[mtyaka]

This patch adds support for using unicode strings that contain non-ascii characters in settings.

Trying to use non-ascii characters for contact person's given name for example, would fail with unicode encode errors in various places.

The most common settings that may contain non-ascii characters are:

{
  ...
  "contactPerson": {
    "technical": {
      "givenName": "uTéçhnïçäl Nämé",
      ...
    },
    "support": {
      "givenName": u"Süppört Nämé",
      ...
    }
  },

  "organization": {
    "en-US": {
      "displayName": u"Sérvïçé prövïdér",
      ...
    }
  },
  ...
}

[pitbulk]

Thanks for contribute.

Can you add custom test settings and specific unit test instead of modify the settings and the tests that we had?

[mtyaka]

Thanks for the quick response @pitbulk!

Sure, I will do that tomorrow.

[mtyaka]

@pitbulk I made the requested changes and rebased.