adjust test wrapper to just create env

[vedhavyas]

Thi PR:

• Adds make commands to run and stop local environment, create testing config, and run node using that config
• Scripts cleanup using shellcheck

[codecov]

Codecov Report

Merging #1473 (bf0bc1f) into develop (f8fe3a0) will decrease coverage by 0.10%.
The diff coverage is 9.09%.

@@             Coverage Diff             @@
##           develop    #1473      +/-   ##
===========================================
- Coverage    67.29%   67.19%   -0.11%     
===========================================
  Files          131      131              
  Lines         8665     8681      +16     
===========================================
+ Hits          5831     5833       +2     
- Misses        2154     2168      +14     
  Partials       680      680              

Impacted Files	Coverage Δ
migration/files/02AddPrefix.go	66.66% <0.00%> (ø)
migration/wrapper.go	60.43% <ø> (ø)
utils/httputils.go	23.07% <0.00%> (+3.07%)	⬆️
cmd/centrifuge/create_config.go	33.33% <12.50%> (-1.29%)	⬇️
contextutil/context.go	20.58% <0.00%> (-8.58%)	⬇️

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