The base test class now tries to connect to DB, ignores all tests in the
class if unable to.
Also m_log changed to instance field (which in this case shouldn't cause
any problems), to avoid having to define it separately in each derived
class. Here I touched things that I don't understand well (using log4net),
so please review this commit.
These are some generic classes that simplify writing tests
for any of the data connectors and databases. Among other
things, configuring the connection strings is done once,
in a separate resource file.
Tests based on the new BasicDataServiceTest class require
NUnit 2.5 or better.
