Resolves issue with application memory growth and thread pool

saturation.

Each tunerchannelsource was sharing a thread pool and as the processing
load increased, the thread pool was not expanding and the processing
tasks were backing up, causing the buffers to grow with unprocessed
data.

Changed so that each tuner channel source is handed a thread pool to use
for processing incoming sample data.  Processing chain maintains the
thread pool and starts the channel source.  This allows traffic channels
to reuse the thread pool across multiple iterations.

src/controller/channel/Channel.java

@@ -297,6 +297,9 @@ public class Channel extends Configuration
 
 		/* Broadcast channel deleted event */
 		fireChannelEvent( Event.CHANNEL_DELETED );
+		
+		mProcessingChain.dispose();
+		mProcessingChain = null;
 	}
 	
 	/**
@@ -809,7 +812,7 @@ public class Channel extends Configuration
 	{
 		if( mProcessingChain == null )
 		{
-			mProcessingChain = new ProcessingChain();
+			mProcessingChain = new ProcessingChain( getName() );
 			
 			/* Get the optional alias list for the decode modules to use */
 			AliasList aliasList = mResourceManager.getPlaylistManager()