CIMI client: display ForwardingGroupTemplates

Partial fix for DTACLOUD-409
CIMI client: display ForwardingGroups

Partial fix for DTACLOUD-409
CIMI client: display machine disks

Fix for https://issues.apache.org/jira/browse/DTACLOUD-404
CIMI webapp: changed routing_group to forwarding_group
CIMI: rename vsp to networkPort in the networkPort model
* server/Rakefile: fix build on Ruby 1.8.7