If one is trying to compile a JDBC 1 driver and junit.jar is in the
CLASSPATH, then the build fails as ant tries to build the JDBC 2 test
classes. This patch fixes this problem by excluding the jdbc 2 files
unless the jdk1.2+ property is set.
<exclude name="${package}/xa/**" unless="datasource" />
<exclude name="${package}/test/**" unless="junit" />
+ <exclude name="${package}/test/jdbc2/**" unless="jdbc2" />
+ <exclude name="${package}/test/JDBC2Tests.java" unless="jdbc2" />
</javac>
</target>