Do not print verbose info about app updates if there are none

This is cosmetical but if you have a large number of apps installed then
you'll see a wall of text during the server and app upgrade when it
tries to update each app via the app store. In may cases nothing will be
updated. For those boring cases we can hide the verbose info, but show
when occ is run with -v. Any actual update will still print a few lines.
Those are the important ones for the admin.

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

core/Command/Upgrade.php

@@ -204,15 +204,9 @@ class Upgrade extends Command {
 			$updater->listen('\OC\Updater', 'incompatibleAppDisabled', function ($app) use ($output) {
 				$output->writeln('<comment>Disabled incompatible app: ' . $app . '</comment>');
 			});
-			$updater->listen('\OC\Updater', 'checkAppStoreAppBefore', function ($app) use ($output) {
-				$output->writeln('<info>Checking for update of app ' . $app . ' in appstore</info>');
-			});
 			$updater->listen('\OC\Updater', 'upgradeAppStoreApp', function ($app) use ($output) {
 				$output->writeln('<info>Update app ' . $app . ' from App Store</info>');
 			});
-			$updater->listen('\OC\Updater', 'checkAppStoreApp', function ($app) use ($output) {
-				$output->writeln('<info>Checked for update of app "' . $app . '" in App Store </info>');
-			});
 			$updater->listen('\OC\Updater', 'appSimulateUpdate', function ($app) use ($output) {
 				$output->writeln("<info>Checking whether the database schema for <$app> can be updated (this can take a long time depending on the database size)</info>");
 			});

core/ajax/update.php

@@ -160,15 +160,9 @@ if (\OCP\Util::needUpgrade()) {
 	$updater->listen('\OC\Updater', 'dbUpgrade', function () use ($eventSource, $l) {
 		$eventSource->send('success', $l->t('Updated database'));
 	});
-	$updater->listen('\OC\Updater', 'checkAppStoreAppBefore', function ($app) use ($eventSource, $l) {
-		$eventSource->send('success', $l->t('Checking for update of app "%s" in App Store', [$app]));
-	});
 	$updater->listen('\OC\Updater', 'upgradeAppStoreApp', function ($app) use ($eventSource, $l) {
 		$eventSource->send('success', $l->t('Update app "%s" from App Store', [$app]));
 	});
-	$updater->listen('\OC\Updater', 'checkAppStoreApp', function ($app) use ($eventSource, $l) {
-		$eventSource->send('success', $l->t('Checked for update of app "%s" in App Store', [$app]));
-	});
 	$updater->listen('\OC\Updater', 'appSimulateUpdate', function ($app) use ($eventSource, $l) {
 		$eventSource->send('success', $l->t('Checking whether the database schema for %s can be updated (this can take a long time depending on the database size)', [$app]));
 	});

lib/private/Updater.php

@@ -559,13 +559,13 @@ class Updater extends BasicEmitter {
 			$log->info('\OC\Updater::incompatibleAppDisabled: Disabled incompatible app: ' . $app, ['app' => 'updater']);
 		});
 		$this->listen('\OC\Updater', 'checkAppStoreAppBefore', function ($app) use ($log) {
-			$log->info('\OC\Updater::checkAppStoreAppBefore: Checking for update of app "' . $app . '" in appstore', ['app' => 'updater']);
+			$log->debug('\OC\Updater::checkAppStoreAppBefore: Checking for update of app "' . $app . '" in appstore', ['app' => 'updater']);
 		});
 		$this->listen('\OC\Updater', 'upgradeAppStoreApp', function ($app) use ($log) {
 			$log->info('\OC\Updater::upgradeAppStoreApp: Update app "' . $app . '" from appstore', ['app' => 'updater']);
 		});
 		$this->listen('\OC\Updater', 'checkAppStoreApp', function ($app) use ($log) {
-			$log->info('\OC\Updater::checkAppStoreApp: Checked for update of app "' . $app . '" in appstore', ['app' => 'updater']);
+			$log->debug('\OC\Updater::checkAppStoreApp: Checked for update of app "' . $app . '" in appstore', ['app' => 'updater']);
 		});
 		$this->listen('\OC\Updater', 'appSimulateUpdate', function ($app) use ($log) {
 			$log->info('\OC\Updater::appSimulateUpdate: Checking whether the database schema for <' . $app . '> can be updated (this can take a long time depending on the database size)', ['app' => 'updater']);