New feature Request: New DPB WIM Connector

Change-Id: I1f9d33ed30b95ab2bcda4c5987f4847c672ab069

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+# Addition of new Wim Connector DPB  #
+
+## Proposer ##
+- Steven Simpson (Lancaster University)
+- Paul McCherry (Lancaster University)
+
+## Type ##
+**Feature**
+
+## Target MDG/TF ##
+NBI, RO
+
+## Description ##
+This feature will add a new WIM connector, DPB to OSM. It is configurable and able to use either a
+REST or SSH interface although the SSH interface is mainly used for management operations. It has
+the ability to optionally make use of bandwidth parameters to create and edit logical networks.
+
+DPB is an extensible network management framework, offering support for the WIM abstraction in the
+NFV-MANO data model. The architecture of the system follows a multi-layer design approach.
+
+At the top of the system is the aggregator layer, which is responsible for service persistence,
+allocation of trunk resources, and end-to-end path computation.The aggregator layer exposes a single
+northbound interface (NBI) to the resource orchestrator for the management of logical networks
+across datacenters.
+
+The aggregator NBI can be used recursively by a top-level aggregator, in order to
+abstract different technological or administrative domains and offer scalability through control
+delegation.
+
+The logical-switch layer  constitutes the middle layer of the DPB architecture and is
+responsible for persisting configuration and forwarding state for network devices. A logical switch
+offers the same control NBI as an aggregator. Control of the underlying network devices is achieved
+through the fabric adaptation layer, which translates forwarding policy into technology-specific
+configuration.
+
+The communication between the different layers of DPB is facilitated by a hierarchical
+data model. DPB offers hierarchical control of programmable WANs and defines a detailed WAN control
+data model. A WIM Connector (wimconn_dpb.py) has been written to integrate DPB with OSM release 6
+
+## Demo or definition of done ##
+- See Presentations from Hackfest #7 Patras,
+- 1.      DPB Introduction,
+- 2.      WIM integration, configuration & Implementation,
+- 3.      WIM CDN use case
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