feat : Change the class used by the Oracle database driver

HikariCP logs a Warning when using the oracle.jdbc.driver.OracleDriver class. The use of the oracle.jdbc.OracleDriver class is now recommended (see https://stackoverflow.com/questions/6202653/difference-between-oracle-jdbc-driver-classes/6202721#6202721).

modules/oracle-xe/src/main/java/org/testcontainers/containers/OracleContainer.java

@@ -110,7 +110,7 @@ public Set<Integer> getLivenessCheckPortNumbers() {
 
     @Override
     public String getDriverClassName() {
-        return "oracle.jdbc.driver.OracleDriver";
+        return "oracle.jdbc.OracleDriver";
     }
 
     @Override