ARROW-1330: [Plasma] Turn on plasma tests on manylinux1
ARROW-1330: [Plasma] Turn on plasma tests on manylinux1

With ARROW-1312 merged, these tests should pass now.

Author: Philipp Moritz <pcmoritz@gmail.com>

Closes #939 from pcmoritz/reactivate-plasma-tests and squashes the following commits:

6ec77495 [Philipp Moritz] reactivate plasma tests in manylinux1

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