Enables allow_erasure_coded_files by default as we've now completed all
planned work to support it.
Testing
- Ran HDFS+EC test suite
- Ran Ozone+EC test suite
Change-Id: I0cfef087f2a7ae0889f47e85c5fab61a795d8fd4
Reviewed-on: http://gerrit.cloudera.org:8080/19362
Reviewed-by: Joe McDonnell <joemcdonnell@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>