PARQUET-997: Fix override compiler warnings
PARQUET-997: Fix override compiler warnings

Author: Phillip Cloud <cpcloud@gmail.com>

Closes #338 from cpcloud/PARQUET-997 and squashes the following commits:

74acf45 [Phillip Cloud] PARQUET-997: Fix override compiler warnings

Change-Id: I976b1699eea35929104072ec86c1a450f259a2cb

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