Fixed #14864, #14864 -- ROCIFField didn't accept values starting with RO, as...

Fixed #14864, #14864 -- ROCIFField didn't accept values starting with RO, as it was supposed to, and ROCNPField, ROIBANField, and ROPhoneNumberField didn't handle all EMPTY_VALUES correctly.  Also converted Romanian localflavor doctests to unittests.  We have always been at war with doctests.  Thanks to Idan Gazit.

Fixing RO localflavor clean() #14864

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14951 bcc190cf-cafb-0310-a4f2-bffc1f526a37