Compute module added for active/active EC2 - EUCA-8400

New compute / compute-common modules are added for an active/active EC2
service implementation.

Bindings are temporarily modified to allow the same messages to be
bound differently depending on the target component. This is currently
necessary as both the new Compute and existing Eucalyptus service
accept EC2 messages.

Administration tools are added for registration, listing and
deregistration of the compute service.

EUCA-8400
Balancing module added for active/active ELB - EUCA-8600

New balancing / balancing-common modules are added for an active/active
ELB service implementation. These module names are subject to change.

Administration tools are added for registration, listing and
deregistration of the balancing service.

EUCA-8600
Scaling module added for active/active Auto Scaling - EUCA-8597

New scaling / scaling-common modules are added for an active/active
Auto Scaling service implementation. These module names are subject to
change.

Administration tools are added for registration, listing and
deregistration of the scaling service.

EUCA-8597
Monitoring module added for active/active CloudWatch - EUCA-8599

New monitoring / monitoring-common modules are added for an
active/active CloudWatch service implementation. These module names are
subject to change.

Administration tools are added for registration, listing and
deregistration of the monitoring service.

EUCA-8599