Fix MonitorTest's metatype issues and adapt to changes in signal order

This test was broken for a long time due to Qt not supporting qRegisterMetaType
for typedefs correctly. This has been fixed in Qt 4.7, so we can use the test now.

Slight modifications to the test were needed: the order of collectionStatisticsChanged
notifications is reversed in case of item move, and collection(Un)Subscribed signals are
now preceded by collectionChanged() signal.