Additional newline appears when breakpoint is hit (PY-18292)

On python side we pass empty log message when suspend on breakpoint without logging. On Java side if message is empty string instead of null, we decide it's a logging message and print it to the console with new line character.

python/pydevSrc/com/jetbrains/python/debugger/pydev/ProtocolParser.java

@@ -160,7 +160,7 @@ public class ProtocolParser {
     final String name = readString(reader, "name", "");
     final int stopReason = readInt(reader, "stop_reason", 0);
     String message = readString(reader, "message", "None");
-    if ("None".equals(message)) {
+    if ("None".equals(message) || message.isEmpty()) {
       message = null;
     }