don't store content message in Content frame

the message was being needlessly duplicated into the Content frame,
now we only store the size there to be sent out, rather than the whole
message

remove QAMQP prefix in authenticator

src/amqp_authenticator.cpp

@@ -40,9 +40,9 @@ void AMQPlainAuthenticator::setPassword(const QString &p)
 
 void AMQPlainAuthenticator::write(QDataStream &out)
 {
-    QAMQP::Frame::writeField('s', out, type());
-    QAMQP::Frame::TableField response;
+    Frame::writeField('s', out, type());
+    Frame::TableField response;
     response["LOGIN"] = login_;
     response["PASSWORD"] = password_;
-    QAMQP::Frame::serialize(out, response);
+    Frame::serialize(out, response);
 }

src/amqp_exchange.cpp

@@ -261,7 +261,7 @@ void Exchange::publish(const QByteArray &message, const QString &routingKey,
     MessageProperties::ConstIterator itEnd = properties.constEnd();
     for (it = properties.constBegin(); it != itEnd; ++it)
         content.setProperty(it.key(), it.value());
-    content.setBody(message);
+    content.setBodySize(message.size());
     d->sendFrame(content);
 
     int fullSize = message.size();

src/amqp_frame.cpp

@@ -514,7 +514,7 @@ qint32 Content::size() const
     buffer_.clear();
     out << qint16(methodClass_);
     out << qint16(0); //weight
-    out << qlonglong(body_.size());
+    out << qlonglong(bodySize_);
 
     qint16 prop_ = 0;
     foreach (int p, properties_.keys())
@@ -566,14 +566,14 @@ qint32 Content::size() const
     return buffer_.size();
 }
 
-void Content::setBody(const QByteArray &data)
+qlonglong Content::bodySize() const
 {
-    body_ = data;
+    return bodySize_;
 }
 
-QByteArray Content::body() const
+void Content::setBodySize(qlonglong size)
 {
-    return body_;
+    bodySize_ = size;
 }
 
 void Content::setProperty(Property prop, const QVariant &value)
@@ -641,10 +641,6 @@ void Content::readPayload(QDataStream &in)
         properties_[cpClusterID] = readField('s', in);
 }
 
-qlonglong Content::bodySize() const
-{
-    return body_.isEmpty() ? bodySize_ : body_.size();
-}
 //////////////////////////////////////////////////////////////////////////
 
 ContentBody::ContentBody()

src/amqp_frame.h

@@ -322,16 +322,14 @@ namespace Frame
          */
         QVariant property(Property prop) const;
 
-        void setBody(const QByteArray &data);
-        QByteArray body() const;
         qlonglong bodySize() const;
+        void setBodySize(qlonglong size);
 
     protected:
         void writePayload(QDataStream &stream) const;
         void readPayload(QDataStream &stream);
         short methodClass_;
         qint16 id_;
-        QByteArray body_;
         mutable QByteArray buffer_;
         QHash<int, QVariant> properties_;
         qlonglong bodySize_;