DVCSMP-1775 - Call poll() every 5 minutes to reduce duplicated calls (#902)

* DVCSMP-1775 - Call poll() every 5 minutes to reduce duplicated calls

Call poll() every 5 minutes instead of discovery() to reduce duplicated
getActivityList() call.

* Better error logging

smartapps/smartthings/logitech-harmony-connect.src/logitech-harmony-connect.groovy

@@ -339,7 +339,7 @@ def initialize() {
 	state.aux = 0
 	if (selectedhubs || selectedactivities) {
 		addDevice()
-        runEvery5Minutes("discovery")
+        runEvery5Minutes("poll")
 	}
 }
 
@@ -396,7 +396,7 @@ def discovery() {
 		log.warn "Connection to the hub timed out. Please restart the hub and try again."
     state.resethub = true
  	} catch (e) {
-		log.warn "Hostname in certificate didn't match. Please try again later."
+    log.info "Logitech Harmony - Error: $e"
 	}
     return null
 }
@@ -522,10 +522,13 @@ def poll() {
         } catch (groovyx.net.http.HttpResponseException e) {
               if (e.statusCode == 401) { // token is expired
                   state.remove("HarmonyAccessToken")
-                return "Harmony Access token has expired"
+                  log.warn "Harmony Access token has expired"
               }
-		} catch(Exception e) {
-        	log.trace e
+        } catch (java.net.SocketTimeoutException e) {
+        	log.warn "Connection to the hub timed out. Please restart the hub and try again."
+              state.resethub = true
+        } catch (e) {
+        	log.info "Logitech Harmony - Error: $e"
         }
     }
 }