mvn -ntp: no transfer progress

[hboutemy]

avoid a lot of noise created by the "Progress" in build log, like

Downloaded from central: https://repo.maven.apache.org/maven2/org/glassfish/javax.json/1.1.4/javax.json-1.1.4.jar (129 kB at 1.8 MB/s)
Progress (1): 1.2/2.8 MB
Progress (1): 1.2/2.8 MB
Progress (1): 1.2/2.8 MB
Progress (1): 1.2/2.8 MB
Progress (1): 1.3/2.8 MB
Progress (1): 1.3/2.8 MB
...

[CLAassistant]

All committers have signed the CLA.