Allow to use custom controller in another package

[Aschen]

What does this PR do?

Consider the following situation:

I have a custom controller in the package custom-controller:

• this package include kuzzle-sdk as peer dependencies
• this package expose a controller inheriting from BaseController class of kuzzle-sdk

I have my project including custom-controller and kuzzle-sdk as dependencies.

I will not be able to use my controller since the SDK checks if the controller is an instanceof BaseController but since these class are used in 2 different modules, the check fail.

This PR does not checks anymore if the controller is an instance of BaseController but it stills checks that the interface is respected (kuzzle and name properties present)

Other changes

• use scroll of 10s

[codecov]

Codecov Report

Merging #500 into master will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #500      +/-   ##
==========================================
- Coverage   95.80%   95.79%   -0.01%     
==========================================
  Files          32       32              
  Lines        1311     1308       -3     
==========================================
- Hits         1256     1253       -3     
  Misses         55       55              

Impacted Files	Coverage Δ
src/Kuzzle.js	93.96% <ø> (-0.08%)	⬇️

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