OIC - Opaque schema for creating base64Binary file

Opaque_schema.xsd: this will be used in the stage write file adapter configuration.

<?xml version='1.0' encoding='UTF-8'?>

<schema targetNamespace="http://xmlns.oracle.com/pcbpel/adapter/opaque/" xmlns="http://www.w3.org/2001/XMLSchema">

<element name="opaqueElement" type="base64Binary"/>

</schema>