Better font management

[julien-deramond]

• Remove NOTICE.txt 2 files because we don't embed the font here. It is handled by Boosted.
• Remove @import '~boosted/dist/css/orangeHelvetica.min.css' from https://github.com/Orange-OpenSource/IOT-Map-Component/blob/master/src/iotMapManager/iot-map-manager.css because it must be done by the project when it loads Boosted by itself.
• In CSS files which declare font-family: "Helvetica Neue", 'helvetica'. Do the same thing than in Boosted.