XACK check is using strings as opposed to integer on reply checking

[filipecosta90]

Sample error log (that should have been ok ) :

2021-08-19 15:34:30 INFO sucessfully built build variant icc-2021.3.0-amd64-ubuntu18.04-libc for redis git_sha b'0cf2df84d4b27af4bffd2bf3543838f09e10f874'. Stream id: b'1629387270750-0'
2021-08-19 15:34:30 ERROR Unable to acknowledge build variation stream with id b'1629386915152-0'. XACK reply 1
2021-08-19 15:34:30 INFO Entering blocking read waiting for work.