[AIRFLOW-2407] import logging for line 70 of qubole_sensor.py

[cclauss]

flake8 testing of https://github.com/apache/incubator-airflow on Python 3.6.3

$ flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics

./airflow/contrib/sensors/qubole_sensor.py:68:13: F821 undefined name 'logging'
            logging.exception(e)
            ^

Make sure you have checked all steps below.

JIRA

• My PR addresses the following Airflow JIRA issues and references them in the PR title. For example, "[AIRFLOW-XXX] My Airflow PR"
  • https://issues.apache.org/jira/browse/AIRFLOW-XXX
  • In case you are fixing a typo in the documentation you can prepend your commit with [AIRFLOW-XXX], code changes always need a JIRA issue.

Description

• Here are some details about my PR, including screenshots of any UI changes:
  See above.

Tests

• My PR adds the following unit tests OR does not need testing for this extremely good reason:
  This PR fixes flake8 tests that are currently failing.

Commits

• My commits all reference JIRA issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "How to write a good git commit message":
  1. Subject is separated from body by a blank line
  2. Subject is limited to 50 characters
  3. Subject does not end with a period
  4. Subject uses the imperative mood ("add", not "adding")
  5. Body wraps at 72 characters
  6. Body explains "what" and "why", not "how"

Documentation

• In case of new functionality, my PR adds documentation that describes how to use it.
  • When adding new operators/hooks/sensors, the autoclass documentation generation needs to be added.

Code Quality

• Passes git diff upstream/master -u -- "*.py" | python3 -m flake8 --diff

[Fokko]

Please don't import logging, but use this.log.

[cclauss]

LOL... this is an undefined name...

flake8 testing of https://github.com/apache/incubator-airflow on Python 3.6.3

$ flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics

./airflow/contrib/sensors/qubole_sensor.py:62:9: F821 undefined name 'this'
        this.log.info('Poking: %s', self.data)
        ^
./airflow/contrib/sensors/qubole_sensor.py:68:13: F821 undefined name 'logging'
            logging.exception(e)
            ^
./airflow/contrib/sensors/qubole_sensor.py:71:9: F821 undefined name 'this'
        this.log.info('Status of this Poke: %s', status)
        ^

this also conflicts with the standard library module:
$ python
>>> import this

[codecov-io]

Codecov Report

Merging #3297 into master will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3297      +/-   ##
==========================================
+ Coverage   75.87%   75.89%   +0.02%     
==========================================
  Files         197      197              
  Lines       14706    14706              
==========================================
+ Hits        11158    11161       +3     
+ Misses       3548     3545       -3

Impacted Files	Coverage Δ
airflow/jobs.py	82.83% <0%> (+0.26%)	⬆️

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[kaxil]

@cclauss Please can you create a single Pull Request for [AIRFLOW-2407] JIRA instead of separate PR as below:
#3293
#3294
#3296
#3297
#3298
#3299
?

[cclauss]

#3294 (comment)

[cclauss]

Closed in favor of #3307