Rearrange the automatic tests.

Split them into unit and integration tests.  Integration tests really
need to be run on the real platform (not in a VM etc) since they are
somewhat unstable or nonfunctional otherwise.

A few tests were previously broken by QUrl changes and they were repaired.
Removed one test since it was not providing a lot of value.

There are still a number of tests that rely on Q_AUTOTEST_EXPORT symbols.

Change-Id: Ic402abf0af946baa5945075d975b3f584f9ef280
Reviewed-by: Kalle Lehtonen <kalle.ju.lehtonen@nokia.com>

tests/auto/unit/qmediaimageviewer/images.qrc

@@ -0,0 +1,9 @@
+<RCC>
+    <qresource prefix="/">
+        <file>images/coverart.png</file>
+        <file>images/image.jpg</file>
+        <file>images/image.png</file>
+        <file>images/invalid.png</file>
+        <file>images/poster.png</file>
+    </qresource>
+</RCC>

tests/auto/unit/qmediaimageviewer/images/invalid.png

@@ -0,0 +1,2 @@
+This is not really a PNG file.
+

tests/auto/unit/qmediaimageviewer/qmediaimageviewer.pro

@@ -0,0 +1,16 @@
+CONFIG += testcase
+TARGET = tst_qmediaimageviewer
+
+QT += multimedia-private network testlib
+CONFIG += no_private_qt_headers_warning
+
+SOURCES += tst_qmediaimageviewer.cpp
+
+RESOURCES += \
+        images.qrc
+
+!contains(QT_CONFIG, no-jpeg):DEFINES += QTEST_HAVE_JPEG
+
+wince* {
+    !contains(QT_CONFIG, no-jpeg): DEPLOYMENT_PLUGIN += qjpeg
+}