refactor: dont show curl progress in jibri log

[emrahcom]

Run curl in silent mode to not add the curl progress info into jibri service logs,

such as

graceful_shutdown.sh[1053]:   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
graceful_shutdown.sh[1053]:                                  Dload  Upload   Total   Spent    Left  Speed

[jitsi-jenkins]

Hi, thanks for your contribution!
If you haven't already done so, could you please make sure you sign our CLA (https://jitsi.org/icla for individuals and https://jitsi.org/ccla for corporations)? We would unfortunately be unable to merge your patch unless we have that piece :(.

[codecov]

Codecov Report

Merging #520 (8d1f2bc) into master (aae8846) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #520   +/-   ##
=========================================
  Coverage     48.17%   48.17%           
  Complexity      174      174           
=========================================
  Files            72       72           
  Lines          2113     2113           
  Branches        201      201           
=========================================
  Hits           1018     1018           
  Misses         1027     1027           
  Partials         68       68           

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update aae8846...8d1f2bc. Read the comment docs.

[saghul]

👍