test: longer timeout for Pub/Sub system tests

[alexander-fenster]

Fixes random Pub/Sub test failures caused by extra testing added (packaging and stuff).

• Tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

[codecov]

Codecov Report

Merging #451 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #451   +/-   ##
=======================================
  Coverage   92.81%   92.81%           
=======================================
  Files          26       26           
  Lines        2769     2769           
  Branches       72       72           
=======================================
  Hits         2570     2570           
  Misses        187      187           
  Partials       12       12

---

Continue to review full report at Codecov.

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[codecov]

Codecov Report

Merging #451 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #451   +/-   ##
=======================================
  Coverage   92.81%   92.81%           
=======================================
  Files          26       26           
  Lines        2769     2769           
  Branches       72       72           
=======================================
  Hits         2570     2570           
  Misses        187      187           
  Partials       12       12

---

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 be780ab...5014f0f. Read the comment docs.