Default to RMFAIL instead of RMERR

[tkyc]

#2346

[codecov]

Codecov Report

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

Project coverage is 50.13%. Comparing base (eae6d7b) to head (65c4d26).
Report is 2 commits behind head on main.

❗ Current head 65c4d26 differs from pull request most recent head f056aa7. Consider uploading reports for the commit f056aa7 to get more accurate results

Files	Patch %	Lines
.../microsoft/sqlserver/jdbc/SQLServerXAResource.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##               main    #2348       +/-   ##
=============================================
- Coverage     73.56%   50.13%   -23.43%     
+ Complexity     6079     3790     -2289     
=============================================
  Files           143      143               
  Lines         33179    33146       -33     
  Branches       5631     5620       -11     
=============================================
- Hits          24407    16619     -7788     
- Misses         6255    14143     +7888     
+ Partials       2517     2384      -133     

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[Jeffery-Wasty]

Also removed unused getRootCause in Util.java (+java.util.List and java.util.ArrayList imports needed for it) (added in 2nd XA PR [#2132])