Clean up CheckXmlProperties

[macchiati]

See https://unicode-org.github.io/unicodetools/newunicodeproperties.html#checking-xml-properties

1. Make into JUnit test
2. Fix the failures and warnings due to differences in handling (default values) and problems with the test (interpreting #, and \u00xxx.)
3. Also:

• TheMeroitic fraction series, expressed as twelfths. They won't match exactly if the stored fractional values are all reduced. This should be marked as expected, if this is the way the test works.
• Named_Sequences_Prov is always provisional and never approved. It shouldn't be in the XML (and isn't) and shouldn't be tested for (other than its non-appearance, I suppose).
• kRSJapanese, kRSKanWa, and KRSKorean were provisional fields, never given informational status, and have been yanked altogether from Unihan. They also should not appear and not be tested for.

See also issue #125 “Remove false positives from the ucdxml consistency tests”