ADF/RIDC: Multiple sort in RIDC

Following is the way to specify multiple sort while using "GET_SEARCH_RESULTS" service through RIDC java APIs

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    DataBinder requestDataBinder = idcClient.createBinder();
    requestDataBinder.putLocal("IdcService", "GET_SEARCH_RESULTS");
    requestDataBinder.putLocal("QueryText", doc.getSearchQuery());
    requestDataBinder.putLocal("SearchEngineName", "DATABASE");

    requestDataBinder.putLocal("SortSpec",
        "ORDER BY metadataField01 asc, metadataField02 asc, metadataField03 asc");
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