one more change to hive verisoning in emr.py

Should fix the following error:
-------------
[INFO 2013-11-03 03:13:24,220] Step 2: Run hive jobs and wait for
completion.  Couldn't determine jobflow id from [Error: Expected
argument --hive-versions VERSIONS to follow one of --hive-script,
--hive-interactive, --hive-site].
-------------
which was preventing the daily reports job from running.

Test plan: I installed this fix on the analytics
machine and it un-borked the daily reports job.

Auditors: mattfaus