POM: update to pom-imagej 2.40
POM: update to pom-imagej 2.40

This updates the versions of several components to include the new
anonymous usage statistics subsystem.

TehSAUCE/imagej,biovoxxel/imagej,TehSAUCE/imagej,biovoxxel/imagej,TehSAUCE/imagej,biovoxxel/imagej