Refactored FormattingSwitch...Tests suites

[fresheed]

While digging through field updating logic I came across FormattingSwitch...Tests classes which (as I understood) are etalons on how different properties values are parsed. Unfortunately these classes contained a lot of duplicating and were hard to read. So I refactored them:

• Junit's parametrized tests feature was used. So test cases which are only differ in values to test were replaced with single lines in test values list.
• These classes contained duplicating code such as doit, getFormat methods and SwitchTestData utility classes. So FormattingTestsBase superclass was introduced.

As a result, these classes are now several times shorter than originals.