Remove timage.svg test from stressSgraphics

Now SVG includes stored images, which are big and vary
on different platforms

Author: linev

test/stressGraphics.cxx

@@ -3681,7 +3681,9 @@ void timage()
    img->Draw();
    C->cd();
 
-   TestReport(C, "timage", "TImage");
+   // exclude SVG testing while image stored as PNG which is depends on used library version
+   // without compression file will be huge
+   TestReport(C, "timage", "TImage", "", kSkipSvgTest);
 }