Hotfix/remove extra repeating code

Created by: ghulamMustafaRaza

I'm Noticed that this code repeat many and many times:

import('./features/env/ExpandEnvVariables').then(f =>
  this.setFeature(f.default)
);

so i have created a function

setFeatureFromString(featureString) {
  import(featureString).then(f =>
    this.setFeature(f.default)
  );
}

and use like this

this.setFeatureFromString('./features/env/ExpandEnvVariables')