delete migration code from previous versions

As upgrading to 3.3 should be done only from the last 3.2.X packages
and migration code for that will be added if needed before the 3.3 release
Use printableName in Configure Module popup
Use ou=Users as baseDN in sogo.conf if openchange_disable_multiou=yes
fix typo on motd message
added icon alias
update sogo version
Merge pull request #745 from Zentyal/jacalvo/remove-migrations

delete migration code from previous versions
Merge branch 'master' into jacalvo/fix-ro

Conflicts:
	main/core/ChangeLog