[*] Redesigned datum entry into mempool: now they are recorded with the key...

Backport task #7169 Redesigned datum entry into mempool: now they are recorded with the key not as a datum hash, but as a hash of its contents.

CMakeLists.txt

@@ -68,6 +68,7 @@ endif()
 
 if(BUILD_TESTS)
     include(cmake/OS_Detection.cmake)
+    add_subdirectory(dap-sdk)
 endif()
 
 if (BUILD_WITH_ZIP)