ARROW-5421: [Packaging][Crossbow] Duplicated key in nightly test configuration
ARROW-5421: [Packaging][Crossbow] Duplicated key in nightly test configuration

Author: Krisztián Szűcs <szucs.krisztian@gmail.com>

Closes #4394 from kszucs/ARROW-5421 and squashes the following commits:

f21dc838 <Krisztián Szűcs> fix duplicated key

apache/arrow,kou/arrow,icexelloss/arrow,majetideepak/arrow,cpcloud/arrow,laurentgo/arrow,renesugar/arrow,kou/arrow,xhochy/arrow,apache/arrow,icexelloss/arrow,xhochy/arrow,icexelloss/arrow,icexelloss/arrow,xhochy/arrow,laurentgo/arrow,kou/arrow,xhochy/arrow,laurentgo/arrow,cpcloud/arrow,xhochy/arrow,apache/arrow,cpcloud/arrow,icexelloss/arrow,wesm/arrow,renesugar/arrow,renesugar/arrow,cpcloud/arrow,majetideepak/arrow,wesm/arrow,wesm/arrow,cpcloud/arrow,laurentgo/arrow,majetideepak/arrow,icexelloss/arrow,xhochy/arrow,laurentgo/arrow,icexelloss/arrow,laurentgo/arrow,wesm/arrow,apache/arrow,xhochy/arrow,xhochy/arrow,icexelloss/arrow,xhochy/arrow,xhochy/arrow,cpcloud/arrow,laurentgo/arrow,wesm/arrow,cpcloud/arrow,xhochy/arrow,icexelloss/arrow,renesugar/arrow,laurentgo/arrow,renesugar/arrow,wesm/arrow,xhochy/arrow,renesugar/arrow,wesm/arrow,apache/arrow,cpcloud/arrow,laurentgo/arrow,cpcloud/arrow,kou/arrow,apache/arrow,majetideepak/arrow,renesugar/arrow,kou/arrow,renesugar/arrow,cpcloud/arrow,kou/arrow,laurentgo/arrow,icexelloss/arrow,wesm/arrow,kou/arrow,icexelloss/arrow,xhochy/arrow,renesugar/arrow,kou/arrow,majetideepak/arrow,apache/arrow,majetideepak/arrow,kou/arrow,laurentgo/arrow,kou/arrow,apache/arrow,renesugar/arrow,cpcloud/arrow,cpcloud/arrow,wesm/arrow,cpcloud/arrow,wesm/arrow,wesm/arrow,majetideepak/arrow,kou/arrow,wesm/arrow,laurentgo/arrow,majetideepak/arrow,renesugar/arrow,majetideepak/arrow,renesugar/arrow,wesm/arrow,majetideepak/arrow,kou/arrow,apache/arrow,apache/arrow,apache/arrow,xhochy/arrow,xhochy/arrow,renesugar/arrow,wesm/arrow,renesugar/arrow,apache/arrow,cpcloud/arrow,laurentgo/arrow,laurentgo/arrow,kou/arrow,icexelloss/arrow,majetideepak/arrow,icexelloss/arrow,laurentgo/arrow,majetideepak/arrow,renesugar/arrow,apache/arrow,icexelloss/arrow,apache/arrow,majetideepak/arrow,majetideepak/arrow,majetideepak/arrow,kou/arrow