little improvements in serialization configuration
added comment to RpcUtils.getMapper method
improved some methods in RpcUtils class
improvements in RpcUtils class
Created new class NativeSerializer for java native serialization and de
derialization of byte arrays
moved native serialization methods from RpcUtils to NativeSerializer and
used this class in several classes
improved test cases for NativeSerializer class
created JsonSerializer class and moved methods for JSON serialization
from RpcUtils class
improved some methods with JSON serialization by new class
JsonSerializer instead of RpcUtils class