Changed log.errors to log.warn (errors will stop execution)

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@23298 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Completed tag database upgrade; additional changes for CLIManager

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@23299 4ae1f11a-8b86-4847-b8af-ab372f36d1fd