update test_network_status_fees to work on mainnet and testnet

[holtzman]

Motivation

python integration tests fails API v2 test_network_status_fees on mainnet because mainnet lacks FauxUSD token.

In this PR

• update test_network_status_fees to not require fees be set for FauxUSD

[codecov-commenter]

Codecov Report

Attention: 419 lines in your changes are missing coverage. Please review.

Comparison is base (ab2af32) 60.12% compared to head (c0fec72) 54.82%.
Report is 178 commits behind head on main.

Files	Patch %	Lines
full-service/src/json_rpc/v2/api/wallet.rs	24.73%	103 Missing and 40 partials ⚠️
full-service/src/json_rpc/v1/api/wallet.rs	37.50%	30 Missing and 15 partials ⚠️
full-service/src/db/transaction_log.rs	70.92%	0 Missing and 41 partials ⚠️
full-service/src/db/account.rs	81.08%	16 Missing and 12 partials ⚠️
full-service/src/error.rs	0.00%	23 Missing ⚠️
full-service/src/db/schema.rs	39.28%	1 Missing and 16 partials ⚠️
full-service/src/db/wallet_db_error.rs	0.00%	17 Missing ⚠️
full-service/src/config.rs	20.00%	15 Missing and 1 partial ⚠️
full-service/src/db/wallet_db.rs	21.05%	15 Missing ⚠️
full-service/src/db/models.rs	30.00%	11 Missing and 3 partials ⚠️
... and 11 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #962      +/-   ##
==========================================
- Coverage   60.12%   54.82%   -5.31%     
==========================================
  Files          88      124      +36     
  Lines       12356    15840    +3484     
  Branches     2010     2742     +732     
==========================================
+ Hits         7429     8684    +1255     
- Misses       3238     5126    +1888     
- Partials     1689     2030     +341     

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