Adding fixed_ip in create.end notification

Sending the network information for an instance in the create.end notification.

Fixes bug 1185076

Change-Id: Iabe088ed23736d7b1ee97624761445023aab22c2
Initial scheduler support for instance_groups

Scheduler support for blueprint instance-group-api-extension

The patch set adds the following:
1. conductor support for getting instances via the instance_group uuid
2. conductor support for removing an instance from the instance_group
   members

In addition to this it replaces the 'group' hint with 'instance_group'.

DocImpact

Change-Id: I4a4febc2e85d4ffc8b1579d2673fa107171a3c5b
Merge "Adding fixed_ip in create.end notification"
Merge "Initial scheduler support for instance_groups"
Merge remote-tracking branch 'm_src_repo/citrix-fixes' into build-temp