Improve logic for better inter-instance communication

[d-gubert]

This PR improves how the engine triggers inter-instance communication.

Pre-requisite for this Rocket.Chat PR

[codecov]

Codecov Report

Merging #128 into master will decrease coverage by 1.78%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #128      +/-   ##
==========================================
- Coverage    59.9%   58.11%   -1.79%     
==========================================
  Files          71       63       -8     
  Lines        2342     2230     -112     
  Branches      344      344              
==========================================
- Hits         1403     1296     -107     
+ Misses        939      934       -5

Impacted Files	Coverage Δ
src/server/AppManager.ts	15.06% <0%> (+0.36%)	⬆️
src/server/managers/AppLicenseManager.ts	20.45% <0%> (-2.05%)	⬇️
src/server/errors/index.ts
src/server/managers/index.ts
src/server/accessors/index.ts
src/server/marketplace/license/index.ts
src/server/compiler/index.ts
src/server/storage/index.ts
src/server/logging/index.ts
src/server/bridges/index.ts

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