closes #601987
1) sqlutils.restore_from_file have to use its confirm argument when
a command fail, to propose to continue there (this can't be handled
by the caller)
2) source.restore method hence needs to take this confirmation callback
as argument
3) properly fix places where 'drop' was given instead of 'confirm'
# some entities have been added before schema entities, fix the 'is' and
# 'is_instance_of' relations
for rtype in ('is', 'is_instance_of'):
sql('INSERT INTO %s_relation '
'SELECT X.eid, ET.cw_eid FROM entities as X, cw_CWEType as ET '
'WHERE X.type=ET.cw_name AND NOT EXISTS('
' SELECT 1 from is_relation '
' WHERE eid_from=X.eid AND eid_to=ET.cw_eid)' % rtype)