OSGi RFC#122 tries to standardize the way by which drivers (datasources) are
made available to OSGi applications via OSGi Service registry.
Currently GlassFish (which runs on OSGi) has its traditional way of detecting
JDBC drivers (drivers are made available in "lib" directories of GlassFish).
This behavior can be changed so that GlassFish can rely on OSGi to get installed
jdbc-drivers in the system and make use of them.