provisioners/shell: Use ui.detail for displaying output
provisioners/shell: Use ui.detail for displaying output

Output format of ui.info method (bold text) makes reading long script outputs really heavy on the eyes. ui.detail is a better match for this type of output.
sni/vagrant,taliesins/vagrant,mitchellh/vagrant,chrisroberts/vagrant,crashlytics/vagrant,sni/vagrant,gitebra/vagrant,PatrickLang/vagrant,taliesins/vagrant,gitebra/vagrant,mitchellh/vagrant,taliesins/vagrant,PatrickLang/vagrant,chrisroberts/vagrant,marxarelli/vagrant,gitebra/vagrant,chrisroberts/vagrant,bryson/vagrant,crashlytics/vagrant,mitchellh/vagrant,marxarelli/vagrant,chrisroberts/vagrant,marxarelli/vagrant,mitchellh/vagrant,bryson/vagrant,benh57/vagrant,PatrickLang/vagrant,crashlytics/vagrant,benh57/vagrant,marxarelli/vagrant,bryson/vagrant,sni/vagrant,crashlytics/vagrant,bryson/vagrant,benh57/vagrant,taliesins/vagrant,PatrickLang/vagrant,gitebra/vagrant,sni/vagrant,benh57/vagrant