module-jni: failure to load some jdbc drivers due to class loader handling errors from native Java

[davidnich]

when Qore methods wrapping native java are used from Java, dynamic dispatch needs to be used to create jdbc connections in order for the class loader context to be set correctly in Java

otherwise errors of the following type can occur even with valid URLs and a valid classpath:

java.sql.SQLException: No suitable driver found for jdbc:sqlserver://rippy;port=1433;encrypt=false
	at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:706)
	at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:190)
	at org.qore.jni.QoreObjectBase.create0(Native Method)
	at org.qore.jni.QoreObjectBase.<init>(QoreObjectBase.java:19)
	at org.qore.jni.QoreObject.<init>(QoreObject.java:22)
	at org.qore.jni.QoreJavaClassBase.<init>(QoreJavaClassBase.java:10)
	at QoreURLClassLoader//qore.Qore.SQL.AbstractDatasource.<init>(Unknown Source)
	at QoreURLClassLoader//qore.Qore.SQL.DatasourcePool.<init>(Unknown Source)
	at QoreURLClassLoader//DsTest.main(DsTest.java:19)