Refactor parameters resolution and merging

[rumpl]

Making the parameter resolution reusable by install/upgrade and inspect in the future.

- What I did Refactored the code that manages bundle parameters and overrides.

- How I did it With Silvin, with tests.

- A picture of a cute animal (not mandatory but encouraged) Happiest animal on earth, a chipper quokka, don't say it isn't cute.

[GordonTheTurtle]

Please sign your commits following these rules: https://github.com/moby/moby/blob/master/CONTRIBUTING.md#sign-your-work The easiest way to do this is to amend the last commit:

$ git clone -b "refactor-parameters" git@github.com:rumpl/app.git somewhere
$ cd somewhere
$ git commit --amend -s --no-edit
$ git push -f

Amending updates the existing PR. You DO NOT need to open a new one.

[simonferquel]

Although, please sign your commits

[codecov[bot]]

Codecov Report

Merging #457 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #457   +/-   ##
=======================================
  Coverage   67.44%   67.44%           
=======================================
  Files          52       52           
  Lines        2841     2841           
=======================================
  Hits         1916     1916           
  Misses        664      664           
  Partials      261      261

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[silvin-lubecki]

@ulyssessouza PTAL 😸

[ulyssessouza]

LGTM