Restrict mode of test script

[narrieta]

Even though this is just the setup for a test, we should not allow write permissions to everybody. Restricting the mode to owner only.

[codecov]

Codecov Report

Merging #2634 (e3b5377) into develop (71edfe3) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #2634   +/-   ##
========================================
  Coverage    71.96%   71.96%           
========================================
  Files          103      103           
  Lines        15632    15632           
  Branches      2488     2488           
========================================
  Hits         11250    11250           
  Misses        3868     3868           
  Partials       514      514           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 71edfe3...e3b5377. Read the comment docs.