- Fix null pointer java error when connecting to jdbc:drill driver.

By setting the context class loader.
  modified:   storage/connect/JavaWrappers.jar
  modified:   storage/connect/JdbcInterface.java
  modified:   storage/connect/mysql-test/connect/std_data/JdbcMariaDB.jar

storage/connect/JdbcInterface.java

@@ -83,6 +83,9 @@ public class JdbcInterface {
 	    
 	    CheckURL(parms[1], null);
 	    
+	    // This is required for drivers using context class loaders
+	    Thread.currentThread().setContextClassLoader(getClass().getClassLoader());
+	      
     	if (parms[2] != null && !parms[2].isEmpty()) {
   	      if (DEBUG)
   	      	System.out.println("user=" + parms[2] + " pwd=" + parms[3]);