'isSuccess' attribute in file:move stream function is not recognized by the parser

[dilini-muthumala]

Description:
'isSuccess' attribute in file:move stream function is not recognized by the parser.

Affected Product Version:
Streaming Integrator 1.1.0

OS, DB, other environment details and versions:
N/A

Steps to reproduce:

@App:name("FileReader")

define stream fooStream (foo string);

from fooStream#file:move('/Users/dilini/foo.txt', 'Users/dilini/destination/')
select isSuccess
insert into tempStream;

Above siddhi app does not compile.