Enabled three ignored execute via post tests
Use smaller tif for binary tests, renamed tests

Now a 3 KB large tif file is used instead of the old 800 KB large one.
Also, some asynchronous test were named synchronous. I changed this.
Adjusted waiting time for asynch execute tests

As the tiff files for binary execute tests are now much smaller, I
halved the waiting time for asynch execute tests.
Merge branch 'allexecuteposttests'