Don't catch unrecoverable errors in the main loop

Throwable includes Error subtypes, which are not expected to be caught: out of memory errors or thread stop.

We don't have a reason to catch them, so don't.

Author: vickenty

dogstatsd-http-forwarder/src/main/java/com/datadoghq/dogstatsd/http/forwarder/Forwarder.java

@@ -75,7 +75,7 @@ public void run() {
                 runOnce(queue.next());
             } catch (InterruptedException e) {
                 return;
-            } catch (Throwable t) {
+            } catch (Exception t) {
                 logger.log(Level.SEVERE, "unexpected error in forwarder loop", t);
             }
         }