add org_id column to rhnUserExtGroup table
create rhnOrgExtGroupMapping table

for mapping of external groups to server group
introduce OrgUserExtGroup and hibernate mapping
introduce abstract class ExtGroup
introduce create_default_sg column within the rhnOrgConfiguration table
adapt class and mapping for createDefaultSg attribute
introduce new /users/SystemGroupConfig.do page

for system group configuration
create user default system group for the user
Automatic commit of package [spacewalk-java] release [2.2.17-1].