build: update UA validation script
build: update UA validation script

With this change we update the UA usage script to read schemas directly insteads of relying on JSON help.

angular/angular-cli,angular/angular-cli,angular/angular-cli,clydin/angular-cli,geofffilippi/angular-cli,angular/angular-cli,geofffilippi/angular-cli,geofffilippi/angular-cli,geofffilippi/angular-cli,clydin/angular-cli,clydin/angular-cli,clydin/angular-cli