Change import so hive_metastore is not a required module for operator tests

[krishnabhupatiraju]

Dear Airflow Maintainers,

Please accept this PR that addresses the following issues:

• https://issues.apache.org/jira/browse/AIRFLOW-873

Testing Done:

• Ran existing tests in tests/operators/. They were successful

[mention-bot]

@krishnabhupatiraju, thanks for your PR! By analyzing the history of the files in this pull request, we identified @jlowin and @asnir to be potential reviewers.

[krishnabhupatiraju]

@jlowin @artwr Could you take a look.

[jlowin]

Thanks @krishnabhupatiraju -- I think that while your change will in fact prevent the file from being imported, it will also prevent it from being included in any unit tests. Let's see if Travis picks it up.

[jlowin]

Also, I'm in love with this bot. @bolkedebruin is this your doing?

[gsakkis]

I think that while your change will in fact prevent the file from being imported, it will also prevent it from being included in any unit tests.

@jlowin please see #2078 that addressed this issue for many more dormant tests.

[codecov-io]

Codecov Report

Merging #2079 into master will decrease coverage by -0.92%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2079      +/-   ##
==========================================
- Coverage   66.97%   66.05%   -0.92%     
==========================================
  Files         140      140              
  Lines       10639    10639              
==========================================
- Hits         7125     7028      -97     
- Misses       3514     3611      +97

Impacted Files	Coverage Δ
airflow/operators/s3_to_hive_operator.py	0% <ø> (-94.18%)	❌

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 485280a...a5c592b. Read the comment docs.

[krishnabhupatiraju]

@jlowin #2078 does make the same change as this one. So closing this PR Off.