eliminates DataLink useage in MCutout and Merge

data-access/servlet/Makefile

data-access/servlet/src/main/java/cutout/DatasetsImpl.java

...-access/servlet/src/main/java/cutout/json/JdlMCutout.java

data-access/servlet/src/main/java/webapi/ServletMCutout.java

data-access/servlet/src/main/java/webapi/UWSMCutoutWork.java

data-access/servlet/src/main/java/webapi/UWSMergeWork.java

...ss/servlet/src/main/java/webapi/output/XmlSerializer.java