Incorporate changes of #238 into test fixtures.

[deepbrook]

We also had to update the min balance and max funding constants for custom tokens, as those would otherwise trigger an exception when using all default values.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (dev@c260ea9). Click here to learn what that means.
The diff coverage is 100%.

@@          Coverage Diff           @@
##             dev     #260   +/-   ##
======================================
  Coverage       ?   58.54%           
======================================
  Files          ?       64           
  Lines          ?     3141           
  Branches       ?        0           
======================================
  Hits           ?     1839           
  Misses         ?     1302           
  Partials       ?        0

Impacted Files	Coverage Δ
scenario_player/utils/configuration/settings.py	93.97% <100%> (ø)
scenario_player/constants.py	100% <100%> (ø)

---

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 c260ea9...19d73e7. Read the comment docs.