1.修复了一些类的isTerminal没有被初始化的bug

2.修复了一些地方判断下一个Terminal的bug
Signed-off-by: facat@lab.com <facat@lab.com>

testHasttable/breaker.h

@@ -1,12 +1,15 @@
 #ifndef BREAKER_H
 #define BREAKER_H
 #include <QXmlStreamReader>
+#include <QString>
 #include "BasicElementInfo.h"
 class Breaker:public BasicElementInfo
 {
 public:
     explicit Breaker(QObject *parent = 0);
     virtual bool parse(QXmlStreamReader& reader);
+    QString getTerminalA();
+    QString getTerminalB();
 protected:
     QString terminalA;
     QString terminalB;