build/servelt: move RpcAmqp-module to cutout/ and renames dir json-rpc -> json

data-access/servlet/Makefile

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

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

...access/servlet/src/main/java/cutout/json/JsonDecoder.java

...access/servlet/src/main/java/cutout/json/JsonEncoder.java

...s/servlet/src/main/java/cutout/json/JsonEncoderMerge.java