Global Apikey environment and some refactoring

[moritzraho]

Description

fix for #50, goes together with adobe/aio-cli-plugin-app#239

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

Merging #57 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #57   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           18        18           
  Lines          311       307    -4     
  Branches        39        39           
=========================================
- Hits           311       307    -4     

Impacted Files	Coverage Δ
generators/add-action/analytics/index.js	100.00% <ø> (ø)
generators/add-action/audience-manager-cd/index.js	100.00% <ø> (ø)
generators/add-action/campaign-standard/index.js	100.00% <ø> (ø)
generators/add-action/customer-profile/index.js	100.00% <ø> (ø)
generators/add-action/target/index.js	100.00% <ø> (ø)
generators/add-web-assets/exc-react/index.js	100.00% <100.00%> (ø)
lib/ActionGenerator.js	100.00% <100.00%> (ø)
lib/utils.js	100.00% <100.00%> (ø)

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