Moved BGP code and Router code into their own bundle.

The main goal of this is to allow routing code to be used by multiple
applications.

Changes include:
 * Created an onos-app-routing bundle and moved BGP code and routing code
   into it.
 * Created an onos-app-routing-api bundle as a common API bundle between
   onos-app-routing and onos-app-sdnip, to prevent circular dependencies.
 * Moved API classes into onos-app-routing-api bundle.
 * Made Router and BgpSessionManager into OSGi components. This is not quite
   clean, because there is still a chain of start() method calls from SdnIp
   through to BgpSessionManager to preserve startup order. This should be
   revisted so components can be started using activate()
 * Created BgpService and RoutingService APIs to glue different components
   together.
 * Many unit test changes. A lot of the previous unit tests spanned the
   Router and IntentSynchronizer classes, but this is not possible any more
   since these classes are in different bundles. I had to rewrite some of
   these tests so that each unit test class only tests one real class. A
   nice side-effect is that the tests are now simpler because each test
   tests less functionality.
 * Removed SdnIp test seeing as it doesn't run automatically, was already
   broken and has been largely superseded by other unit tests and the nightly
   functional tests.

Change-Id: I70ecf5391aa353e99e7cdcf7ed38a530c87571bb
diff --git a/features/features.xml b/features/features.xml
index 3a227a6..1d77cf9 100644
--- a/features/features.xml
+++ b/features/features.xml
@@ -216,6 +216,8 @@
         <feature>onos-app-proxyarp</feature>
         <feature>onos-app-config</feature>
         <bundle>mvn:org.onosproject/onos-app-sdnip/@ONOS-VERSION</bundle>
+	<bundle>mvn:org.onosproject/onos-app-routing-api/@ONOS-VERSION</bundle>
+	<bundle>mvn:org.onosproject/onos-app-routing/@ONOS-VERSION</bundle>
     </feature>
 
     <feature name="onos-app-calendar" version="@FEATURE-VERSION"