Check fastcdr major version when building FastDDSGEnCodeTester (#964)

Signed-off-by: Mario Dominguez <mariodominguez@eprosima.com>

Author: Mario-DL

code/FastDDSGenCodeTester.cpp

@@ -2,6 +2,10 @@
 #include <string>
 #include <bitset>
 
+#include <fastcdr/config.h>
+
+#if FASTCDR_VERSION_MAJOR > 1
+
 #include <fastcdr/xcdr/optional.hpp>
 
 using octet = unsigned char;
@@ -178,6 +182,8 @@ enum MyBitMask : uint8_t
 };
 //!
 
+#endif // FASTCDR_VERSION_MAJOR > 1
+
 /*
    // INCLUDE_MORE_IDL_FILES
  #include "OtherFile.idl"