Feature/cmp initializer and integration test sample

[alextremp]

This PR:

• unifies the CMP initialization for both real and test usage
• add the test repositories for integration tests
• add a save new consent test
• fixes integration problems in used use cases
• add an custom event polyfill in order to dispatch the cmpReady event

[codecov-io]

Codecov Report

Merging #16 into feature/develop-v1.0.0 will increase coverage by <.01%. The diff coverage is 100%.

@@                    Coverage Diff                     @@
##           feature/develop-v1.0.0      #16      +/-   ##
==========================================================
+ Coverage                   95.42%   95.43%   +<.01%     
==========================================================
  Files                          18       20       +2     
  Lines                         700      811     +111     
  Branches                       56       67      +11     
==========================================================
+ Hits                          668      774     +106     
- Misses                         32       37       +5

Impacted Files	Coverage Δ
...cture/controller/IABConsentManagementProviderV1.js	93.44% <100%> (ø)	:arrow_up:
src/cmp/application/GetConsentDataUseCase.js	100% <100%> (ø)	:arrow_up:
src/cmp/infrastructure/cmpInitializer.js	100% <100%> (ø)
...epository/ConsentStringVendorConsentsRepository.js	100% <100%> (ø)	:arrow_up:
src/cmp/infrastructure/Log.js	85.71% <100%> (ø)

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[alextremp]

@victuxbb the requested changes are ready to be reviewed :)