Add blueprint wiring for the helium OpenflowPluginProvider

Add blueprint wiring for the helium OpenflowPluginProvider

Added a new bundle, openflowplugin-blueprint-config-he, containing the
blueprint XML that instantiates the SwitchConnectionProvider
and OpenflowPluginProvider instances for the helium plugin. It uses
the new SwitchConnectionProviderFactory interface added to the
openflowjava SPI.

This replaces the ConfigurableOpenFlowProviderModule which is now
deprecated but remains for backwards compatibility. The createInstance
method now obtains the OpenflowPluginProvider created via blueprint from
the OSGi registry and returns a proxy instance that delegates to the
actual instance but overrides the close method appropriately.

Patch 3 : Resolved conflict locally

Change-Id: I315444847f5a95d905a5e6adc602445c1101da5b
Signed-off-by: Tom Pantelis <tpanteli@brocade.com>
Signed-off-by: Anil Vishnoi <vishnoianil@gmail.com>