These tests are in reality testing BindingNormalizedNodeCodecRegistry,
move them to mdsal-binding-dom-codec, eliminating their dependency
on AbstractDataBrokerTest.
JIRA: MDSAL-393
Change-Id: I05fd3129efffeac5564096c34f7170a578caa380 Signed-off-by: Robert Varga <robert.varga@pantheon.tech>