upgrade generator to 4.0.16 (Azure#19072)

Author: weidongxu-microsoft

eng/mgmt/automation/parameters.py

@@ -15,8 +15,8 @@
 MAVEN_URL = 'https://repo1.maven.org/maven2/{group_id}/{artifact_id}/{version}/{artifact_id}-{version}.jar'
 
 SDK_ROOT = '../../../'  # related to file dir
-AUTOREST_CORE_VERSION = '3.0.6350'
-AUTOREST_JAVA = '@autorest/[email protected].11'
+AUTOREST_CORE_VERSION = '3.0.6369'
+AUTOREST_JAVA = '@autorest/[email protected].16'
 DEFAULT_VERSION = '1.0.0-beta.1'
 GROUP_ID = 'com.azure.resourcemanager'
 API_SPECS_FILE = 'api-specs.yaml'