Do not use GTask for CamelSession thread jobs
Do not use GTask for CamelSession thread jobs

The GTask thread pool is limited (currently holds up to 10 threads)
and it's shared by all async operations, either directly or indirectly,
which can mean that the asynchronous operations can block session
thread jobs, eventually invoked by the user in UI.

tintou/evolution-data-server,matzipan/evolution-data-server,tintou/evolution-data-server,matzipan/evolution-data-server,matzipan/evolution-data-server,matzipan/evolution-data-server,matzipan/evolution-data-server,tintou/evolution-data-server,tintou/evolution-data-server