Remove unused import.
Update copyright date.
OMSC: Remove unused imports.
MIRI: Clean imports.
Add security token to CallContext.

This change should stop malicious users from
using a service and override the log filename setting,
thus using OMERO to write anywhere on the file system.
Add integration test.
Correct spelling in exception message.
Merge pull request #1866 from bpindelski/11154-logfile

Make log filename setting secure (see #11154).