netdeploy: add KmdJSONOverride

[algorandskiy]

Summary

Sometimes e2e tests fail with handle does not exist error. It ended up to be a wallet handle expiration issue: tests get a handle at the very beginning and keep using it till the end. Handle expiration is 60 seconds and a test can take longer. KMD starts a background thread that removes handles after expiration and there is no way to renew if it was removed.

To solve this I added a new KmdJSONOverride field to network templates (similar to ConfigJSONOverride) to set SessionLifetimeSecs to 5 minutes. At the moment modified only TwoNodes50Each.json and TwoNodes50EachFuture.json templates as the most common ones and ones with such failures.

Test Plan

Run some existing e2e tests locally.

[codecov]

Codecov Report

Attention: Patch coverage is 19.44444% with 29 lines in your changes missing coverage. Please review.

Project coverage is 51.75%. Comparing base (269945c) to head (a27b0ef).

Files with missing lines	Patch %	Lines
netdeploy/networkTemplate.go	25.00%	21 Missing ⚠️
daemon/kmd/config/config.go	0.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6269      +/-   ##
==========================================
- Coverage   51.78%   51.75%   -0.03%     
==========================================
  Files         644      644              
  Lines       86697    86729      +32     
==========================================
- Hits        44894    44888       -6     
- Misses      38933    38974      +41     
+ Partials     2870     2867       -3     

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