Fix deprecation warnings

Author: mfrascati

src/Model/Table/QueuedJobsTable.php

@@ -648,7 +648,7 @@ public function terminateProcess($pid, $sig = SIGTERM) {
 	 * @return string
 	 */
 	protected function _getDriverName() {
-		$className = explode('\\', $this->connection()->config()['driver']);
+		$className = explode('\\', $this->getConnection()->config()['driver']);
 		$name = end($className);
 
 		return $name;

src/Shell/QueueShell.php

@@ -383,7 +383,7 @@ public function getOptionParser() {
 		];
 
 		return parent::getOptionParser()
-			->description($this->_getDescription())
+			->setDescription($this->_getDescription())
 			->addSubcommand('clean', [
 				'help' => 'Remove old jobs (cleanup)',
 				'parser' => $subcommandParser,