Replace map reduce prop in continuous ingest verify

[DomGarguilo]

Fixes #274

[dlmarion]

This property name looks correct for the version of Hadoop

[ctubbsii]

When was this property changed in Hadoop? We need to be careful we're not breaking things with the earliest Hadoop version we still support.

[DomGarguilo]

When was this property changed in Hadoop? We need to be careful we're not breaking things with the earliest Hadoop version we still support.

Honestly I'm not sure. I am having trouble finding what version this change happened in. I do see that the following code was from 13 years ago at which point this property was already deprecated.

https://github.com/apache/hadoop/blame/833da65d8629e0bdd79097ed26033add9fc1864f/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/util/ConfigUtil.java#L325

[ctubbsii]

git tag --contains 833da65d8629e0bdd79097ed26033add9fc1864f shows that it appears in at least Hadoop 3.0.0 and newer, and we don't support anything older than that anymore, so this should be good.