[SPARK-18418] Fix flags for make_binary_release for hadoop profile

[holdenk]

What changes were proposed in this pull request?

Fix the flags used to specify the hadoop version

How was this patch tested?

Manually tested as part of #15659 by having the build succeed.

cc @JoshRosen

[SparkQA]

Test build #68552 has finished for PR 15860 at commit f47101a.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[holdenk]

re-ping @JoshRosen?

[JoshRosen]

Looks good to me. I did a bit of digging and it looks like the bug that this fixes actually ended up causing silent failures in our nightly snapshot package builder:

• http://people.apache.org/~pwendell/spark-nightly/spark-branch-2.0-bin/spark-2.0.3-SNAPSHOT-2016_11_08_00_23-a39f8c1-bin/, which is built off of branch-2.0, has all of the expected packages
• http://people.apache.org/~pwendell/spark-nightly/spark-master-bin/spark-2.1.0-SNAPSHOT-2016_11_09_01_03-e256392-bin/ is missing the packages whose Maven profiles were invalid.

In the builder, the invalid profiles showed up as warnings in the logs:

+ VERSION='[WARNING] The requested profile "hadoop2.6" could not be activated because it does not exist.'

While in the longer term it might be nice to strengthen error-checks in that script to make sure that this doesn't silently break, I don't think it's necessary to do now or a super high priority in general (since any bug here will be caught prior to release), so this looks good to me and I'll merge it now.