Fix another bug with Lombok equals() parameter annotations

[msridhar]

We were getting override errors in relation to the parameter of some Lombok-generated equals() method due to the fix in #874. This error is not reported with the latest version of Error Prone since it properly handles @SuppressWarnings("all"), which is generated by Lombok (see https://github.com/google/error-prone/pull/4076). For compatibility with older Error Prone versions we add our own check for @SuppressWarnings("all").

Getting a test case here required some work since this issue can only be reproduced on older Error Prone versions. We re-jigger some test projects to build against whatever Error Prone version is specified with epApiVersion, so that we catch issues like these in the future.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 87.07%. Comparing base (28cc318) to head (7092ef6).

Files	Patch %	Lines
.../src/main/java/com/uber/nullaway/ErrorBuilder.java	50.00%	0 Missing and 1 partial :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #880      +/-   ##
============================================
- Coverage     87.09%   87.07%   -0.02%     
  Complexity     1990     1990              
============================================
  Files            77       77              
  Lines          6430     6431       +1     
  Branches       1245     1245              
============================================
  Hits           5600     5600              
  Misses          422      422              
- Partials        408      409       +1     

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[msridhar]

FYI I am going to hold off on landing this, as I realized it doesn't completely fix the problems we were seeing. Once we figure out a plan for moving forward, I will land this PR (assuming it's part of that plan).