Quiet output of cv::error in Java tests

Introduced new Java API
void org.opencv.core.Core.setErrorVerbosity(boolean verbose)
used to suppress output to stderr from OpenCV's asserts

modules/java/generator/src/cpp/common.h

@@ -22,6 +22,10 @@
 
 #include "converters.h"
 
+#include "core_manual.hpp"
+#include "features2d_manual.hpp"
+
+
 #ifdef _MSC_VER
 #  pragma warning(disable:4800 4244)
 #endif