Filters the stack trace to ignore the first lines called from this package

(cherry picked from commit 70e2f65)

Author: mrodbratschi

wrappercommon/src/main/java/com/genexus/diagnostics/core/provider/Log4J2Logger.java

@@ -341,7 +341,19 @@ private static boolean isJson(String str) {
 
 	private static List<String> getStackTraceAsList() {
 		List<String> stackTraceLines = new ArrayList<>();
-		for (StackTraceElement ste : Thread.currentThread().getStackTrace()) {
+		StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
+
+		boolean skipping = true;
+		for (StackTraceElement ste : stackTrace) {
+			String className = ste.getClassName();
+
+			// Skip lines from this package
+			if (skipping && (className.startsWith("com.genexus.diagnostics") ||
+				className.startsWith("java.lang.Thread"))) {
+				continue;
+			}
+
+			skipping = false;
 			stackTraceLines.add(ste.toString());
 		}
 		return stackTraceLines;