fix #11693: prevent rename of user's current group
bump database version to OMERO5.0__0 (beta2)
 update database schema to OMERO5.0__0 (beta2)

upgrade script from beta1 already exists
Include OMERO5.0DEV__6 to OMERO5.0__0 in upgrade from OMERO4.4__0.
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 #1800 from joshmoore/1387-simple-salt

Simple salting of MD5 passwords (See #1387)
Merge pull request #1842 from mtbc/db-version-beta2

upgrade database version to beta2
Merge pull request #1845 from joshmoore/rebased/develop/disable-chgrp-event-logs

Disable chgrp event logs (rebased onto develop)
Merge pull request #1853 from joshmoore/rebased/develop/11709-tile-access

11709 tile access (rebased onto develop)
Merge pull request #1861 from mtbc/trac-11693-rename-current-group

fix #11693: prevent rename of user's current group
Merge pull request #1866 from bpindelski/11154-logfile

Make log filename setting secure (see #11154).
Fail properly on import failure
Minor cleanup
Enable memoization for all server-side OMEROWrapper uses