Modernize Qt connections

First commit of modernizarion of Qt signal connections,
the new signal connection is very userfull because of a few
nice things:

- it's checked at compile time instead of runtime
- it can connect to any function or method, so we don't need
to use slots anymore
- it's way faster because it doesn't need to work with string
comparisson, but it's basically a direct call.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

src/AutoPilotPlugins/APM/APMRemoteParamsDownloader.cc

@@ -69,9 +69,8 @@ void APMRemoteParamsDownloader::refreshParamList()
     QUrl url = FRAME_PARAMS_LIST;
     m_networkReply->deleteLater();
     m_networkReply = m_networkAccessManager.get(QNetworkRequest(url));
-    connect(m_networkReply, SIGNAL(finished()), this, SLOT(httpParamListFinished()));
-    connect(m_networkReply, SIGNAL(downloadProgress(qint64,qint64)),
-            this, SLOT(updateDataReadProgress(qint64,qint64)));
+    connect(m_networkReply, &QNetworkReply::finished, this, &APMRemoteParamsDownloader::httpParamListFinished);
+    connect(m_networkReply, &QNetworkReply::downloadProgress, this, &APMRemoteParamsDownloader::updateDataReadProgress);
 }
 
 /* Returned Json Example
@@ -120,9 +119,9 @@ void APMRemoteParamsDownloader::startFileDownloadRequest()
     m_downloadedParamFile->open(QIODevice::WriteOnly);
 
     m_networkReply = m_networkAccessManager.get(QNetworkRequest(url));
-    connect(m_networkReply, SIGNAL(finished()), this, SLOT(httpFinished()));
-    connect(m_networkReply, SIGNAL(readyRead()), this, SLOT(httpReadyRead()));
-    connect(m_networkReply, SIGNAL(downloadProgress(qint64,qint64)), this, SLOT(updateDataReadProgress(qint64,qint64)));
+    connect(m_networkReply, &QNetworkReply::finished, this, &APMRemoteParamsDownloader::httpFinished);
+    connect(m_networkReply, &QNetworkReply::readyRead, this, &APMRemoteParamsDownloader::httpReadyRead);
+    connect(m_networkReply, &QNetworkReply::downloadProgress, this, &APMRemoteParamsDownloader::updateDataReadProgress);
     curr++;
 }
 

src/AutoPilotPlugins/APM/APMRemoteParamsDownloader.h

@@ -17,18 +17,19 @@ class APMRemoteParamsDownloader : public QObject
 public:
     explicit APMRemoteParamsDownloader(const QString& file);
     QString statusText() const;
-public slots:
     void refreshParamList();
     void httpParamListFinished();
     void httpFinished();
     void httpReadyRead();
     void updateDataReadProgress(qint64 bytesRead, qint64 totalBytes);
+
 private:
     void setStatusText(const QString& text);
     void startFileDownloadRequest();
     void manualListSetup();
     void processDownloadedVersionObject(const QByteArray& listObject);
     void startDownloadingRemoteParams();
+
 signals:
     void finished();
 private: