CLOUDSTACK-9348: Make NioConnectio loop less aggressive

- Reverts ea2286 that introduced a wakeup on each connection loop run.
- In SSL handshake code removes delegated tasks to be run in separate threads.

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

utils/src/main/java/com/cloud/utils/nio/Link.java

@@ -615,7 +615,10 @@ public class Link {
                 case NEED_TASK:
                     Runnable task;
                     while ((task = sslEngine.getDelegatedTask()) != null) {
-                        new Thread(task).run();
+                        if (s_logger.isTraceEnabled()) {
+                            s_logger.trace("SSL: Running delegated task!");
+                        }
+                        task.run();
                     }
                     break;
                 case FINISHED:

utils/src/main/java/com/cloud/utils/nio/NioConnection.java

@@ -171,8 +171,6 @@ public abstract class NioConnection implements Callable<Boolean> {
             } catch (final IOException e) {
                 s_logger.error("Agent will die due to this IOException!", e);
                 throw new NioConnectionException(e.getMessage(), e);
-            } finally {
-                _selector.wakeup();
             }
         }
         _isStartup = false;