ARROW-1033: [Python] pytest discovers scripts/test_leak.py
ARROW-1033: [Python] pytest discovers scripts/test_leak.py

Author: Phillip Cloud <cpcloud@gmail.com>

Closes #689 from cpcloud/ARROW-1033 and squashes the following commits:

60a3bc3 [Phillip Cloud] ARROW-1033: [Python] pytest discovers scripts/test_leak.py

apache/arrow,wagavulin/arrow,xhochy/arrow,tebeka/arrow,kou/arrow,majetideepak/arrow,wagavulin/arrow,wagavulin/arrow,renesugar/arrow,NonVolatileComputing/arrow,xhochy/arrow,itaiin/arrow,laurentgo/arrow,apache/arrow,cpcloud/arrow,icexelloss/arrow,renesugar/arrow,wagavulin/arrow,siddharthteotia/arrow,apache/arrow,dremio/arrow,siddharthteotia/arrow,majetideepak/arrow,apache/arrow,itaiin/arrow,itaiin/arrow,renesugar/arrow,wesm/arrow,jeffknupp/arrow,icexelloss/arrow,dremio/arrow,laurentgo/arrow,tebeka/arrow,pcmoritz/arrow,siddharthteotia/arrow,tebeka/arrow,xhochy/arrow,icexelloss/arrow,siddharthteotia/arrow,dremio/arrow,renesugar/arrow,xhochy/arrow,itaiin/arrow,jeffknupp/arrow,dremio/arrow,icexelloss/arrow,siddharthteotia/arrow,dremio/arrow,wagavulin/arrow,itaiin/arrow,majetideepak/arrow,laurentgo/arrow,laurentgo/arrow,xhochy/arrow,majetideepak/arrow,yufeldman/arrow,wesm/arrow,wesm/arrow,cpcloud/arrow,majetideepak/arrow,cpcloud/arrow,renesugar/arrow,wagavulin/arrow,kou/arrow,apache/arrow,jeffknupp/arrow,kou/arrow,yufeldman/arrow,dremio/arrow,xhochy/arrow,jeffknupp/arrow,pcmoritz/arrow,renesugar/arrow,xhochy/arrow,pcmoritz/arrow,laurentgo/arrow,jeffknupp/arrow,tebeka/arrow,tebeka/arrow,NonVolatileComputing/arrow,apache/arrow,jeffknupp/arrow,wesm/arrow,yufeldman/arrow,majetideepak/arrow,pcmoritz/arrow,jeffknupp/arrow,majetideepak/arrow,laurentgo/arrow,itaiin/arrow,apache/arrow,wesm/arrow,NonVolatileComputing/arrow,cpcloud/arrow,wesm/arrow,dremio/arrow,xhochy/arrow,laurentgo/arrow,NonVolatileComputing/arrow,kou/arrow,wesm/arrow,yufeldman/arrow,yufeldman/arrow,majetideepak/arrow,icexelloss/arrow,wagavulin/arrow,renesugar/arrow,icexelloss/arrow,laurentgo/arrow,wesm/arrow,kou/arrow,itaiin/arrow,cpcloud/arrow,yufeldman/arrow,cpcloud/arrow,majetideepak/arrow,tebeka/arrow,itaiin/arrow,siddharthteotia/arrow,yufeldman/arrow,cpcloud/arrow,pcmoritz/arrow,icexelloss/arrow,pcmoritz/arrow,icexelloss/arrow,wesm/arrow,dremio/arrow,yufeldman/arrow,pcmoritz/arrow,kou/arrow,tebeka/arrow,laurentgo/arrow,wagavulin/arrow,icexelloss/arrow,NonVolatileComputing/arrow,jeffknupp/arrow,xhochy/arrow,jeffknupp/arrow,apache/arrow,pcmoritz/arrow,xhochy/arrow,apache/arrow,majetideepak/arrow,apache/arrow,tebeka/arrow,yufeldman/arrow,laurentgo/arrow,pcmoritz/arrow,jeffknupp/arrow,renesugar/arrow,kou/arrow,itaiin/arrow,pcmoritz/arrow,pcmoritz/arrow,wagavulin/arrow,NonVolatileComputing/arrow,pcmoritz/arrow,laurentgo/arrow,pcmoritz/arrow,majetideepak/arrow,wagavulin/arrow,siddharthteotia/arrow,renesugar/arrow,wesm/arrow,itaiin/arrow,kou/arrow,wesm/arrow,wagavulin/arrow,tebeka/arrow,laurentgo/arrow,tebeka/arrow,apache/arrow,icexelloss/arrow,cpcloud/arrow,cpcloud/arrow,pcmoritz/arrow,laurentgo/arrow,xhochy/arrow,xhochy/arrow,renesugar/arrow,xhochy/arrow,pcmoritz/arrow,wagavulin/arrow,NonVolatileComputing/arrow,siddharthteotia/arrow,majetideepak/arrow,NonVolatileComputing/arrow,dremio/arrow,NonVolatileComputing/arrow,yufeldman/arrow,kou/arrow,icexelloss/arrow,cpcloud/arrow,itaiin/arrow,xhochy/arrow,kou/arrow,cpcloud/arrow,jeffknupp/arrow,laurentgo/arrow,cpcloud/arrow,icexelloss/arrow,apache/arrow,icexelloss/arrow,NonVolatileComputing/arrow,cpcloud/arrow,laurentgo/arrow,renesugar/arrow,dremio/arrow,kou/arrow,majetideepak/arrow,majetideepak/arrow,renesugar/arrow,kou/arrow,itaiin/arrow,renesugar/arrow,dremio/arrow,siddharthteotia/arrow,itaiin/arrow,kou/arrow,kou/arrow,cpcloud/arrow,wesm/arrow,siddharthteotia/arrow,apache/arrow,yufeldman/arrow,renesugar/arrow,apache/arrow,siddharthteotia/arrow,itaiin/arrow,renesugar/arrow,wesm/arrow,itaiin/arrow,NonVolatileComputing/arrow,xhochy/arrow,icexelloss/arrow,majetideepak/arrow,wesm/arrow