How to edit DBdatasource configuration

Hi,

I am looking for a solution for clearing sensitive data from the JDBC / DB Datasource steps connection configuration.
I have to replace all the DB connection passwords in all xml files in my composite project.

The following Save Script is working for JDBC steps but not for DB Datasource steps:

project.getProject().getTestSuiteList().each{suite->
        suite.getTestCaseList().each{testCase->
                testCase.getTestStepList().each{step->\
                        //clearing the JDBC steps pass (working)
                        if (step instanceof JdbcRequestTestStep) {
                                step.getJdbcRequestTestStepConfig().setPassword("")
                        }
                        //clearing the DB datasource step pass (not working)
                        if (step instanceof WsdlDataSourceTestStep) {
                                if (step.getDataSource() instanceof DBDataSource) {
                                        //TODO search for a way to clear a datasource pass
                                        step.getDataSourceStepConfig() setPassword("") 
                                }
                        }
                }
        }
}

This is a part of the test case xml file which contains the DB datasource step and I need to modify the highlighted part (or at least the <pass> property value) :

<con:config xsi:type="con:DataSourceStep" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
      <con:dataSource type="JDBC">
        <con:configuration>
          <driver>oracle.jdbc.driver.OracleDriver</driver>
          <connstr>${#Project#oracle_conn}</connstr>
          <pass>myFakePass</pass>
          <Connection>Oracle JDBC( QA )</Connection>
          <query>select * from myTable</query>
          <fetchSize/>
          <stored-procedure>false</stored-procedure>
        </con:configuration>
      </con:dataSource>
      <con:shared>true</con:shared>
      <con:restartShared>true</con:restartShared>
      <con:property>CSKEY</con:property>
      <con:startRow/>
      <con:endRow/>
      <con:recordsPerIteration>1</con:recordsPerIteration>
      <con:completeLastOperation>true</con:completeLastOperation>
      <con:trimValues>false</con:trimValues>
      <con:entitizeValues>false</con:entitizeValues>
      <con:restartOnRun>true</con:restartOnRun>
      <con:expandProperties>false</con:expandProperties>
    </con:config>

Thanks!