Fix: Mirror network endpoints

[bamzedev]

Description:
Updating mirror node endpoints and optimizing readmit times for nodes.

Related issue(s):

Fixes #665, #719

Notes for reviewer:
Its mostly tests, though. There were zero unit tests for this.

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

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[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.06 🎉

Comparison is base (3613e12) 55.50% compared to head (9325a37) 55.57%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #720      +/-   ##
===========================================
+ Coverage    55.50%   55.57%   +0.06%     
===========================================
  Files          162      162              
  Lines        32726    32730       +4     
===========================================
+ Hits         18166    18189      +23     
+ Misses       13282    13270      -12     
+ Partials      1278     1271       -7     

Impacted Files	Coverage Δ
client.go	59.09% <ø> (-0.13%)	⬇️
mirror_network.go	76.00% <ø> (-8.62%)	⬇️
managed_network.go	100.00% <100.00%> (+20.90%)	⬆️

... and 1 file with indirect coverage changes

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0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication