Java skip thumbnails permission tests: use fake pyramidal images
Instead of relying on the deprecated PixelData service to generate an OMERO pyramid for a fake single-resolution image larger than 3kx3k, use the resolutions key to import a multi-resolution fake image.
SkipThumbnailsPermissionsTest: move the pyramid keys to the suffix
As per https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/File.html#createTempFile(java.lang.String,java.lang.String,java.io.File) createTempFile adds internally generated characters between the prefix and the suffix. These characters interfere with the number of resolutions specified by the resolutions key in the filename.
Instead of relying on the deprecated PixelData service to generate
an OMERO pyramid for a fake single-resolution image larger than
3kx3k, use the resolutions key to import a multi-resolution fake
image.