MetaServletCaller.bat
--tac-url=http://localhost:8080/org.talend.administrator
--json-params=
"{
'actionName':'runTask',
'authPass':'TAC_Admin_password',
'authUser':'TAC_Admin_username',
'taskId':1,
'mode':'synchronous',
'context':{'firstname':'Robert','lastname':'Durst'}
}"