tf-worker: use curl command to retrieve the output log file of the job

Retrieving job's output log file using the 'lavacli' utility failed
more frequently, hence instead use the 'curl' command to retrieve the
log file.

Change-Id: Icb88b742c4d30b9e5f047a7d89059dde8325e177
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
1 file changed