Initial fixes for log4j

[dacort]

What changes were proposed in this pull request?

Upgrading log4j v1 to log4j bridge for LIVY-878.

How was this patch tested?

Local tests

Items left todo

Log4j is still included at compile time in the following modules

• livy-integration-test:compile
• livy-coverage-report:compile
• livy-assembly:compile
• livy-server:compile

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 27.53%. Comparing base (ff1f65b) to head (35a2a28).
⚠️ Report is 69 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #381      +/-   ##
============================================
- Coverage     28.24%   27.53%   -0.71%     
+ Complexity      359      354       -5     
============================================
  Files           103      103              
  Lines          5948     6061     +113     
  Branches        899      954      +55     
============================================
- Hits           1680     1669      -11     
- Misses         3921     4070     +149     
+ Partials        347      322      -25     

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[dacort]

Closing in favor of #392