ISIS-1140: reverted mvn requirement to 3.1.1 ...
ISIS-1140: reverted mvn requirement to 3.1.1 ...

... because this seems the latest available on cloudbees (where we build our snapshots)

estatio/isis,incodehq/isis,estatio/isis,niv0/isis,kidaa/isis,sanderginn/isis,estatio/isis,incodehq/isis,oscarbou/isis,kidaa/isis,incodehq/isis,apache/isis,howepeng/isis,peridotperiod/isis,peridotperiod/isis,kidaa/isis,apache/isis,incodehq/isis,apache/isis,niv0/isis,howepeng/isis,apache/isis,oscarbou/isis,sanderginn/isis,sanderginn/isis,howepeng/isis,niv0/isis,apache/isis,oscarbou/isis,oscarbou/isis,apache/isis,howepeng/isis,niv0/isis,estatio/isis,peridotperiod/isis,peridotperiod/isis,kidaa/isis,sanderginn/isis