[WIP] Log line numbers on schema validation errors

[Pretasoc]

This is a pr for #387. It reports the line number of schema validations exceptions to the log in addition to the message.

I still need to collect some test cases and maybe tweak the formatting.

[codecov[bot]]

Codecov Report

Patch coverage: 11.53% and project coverage change: -0.69 :warning:

Comparison is base (e4da0ad) 94.21% compared to head (cadf28c) 93.52%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #388      +/-   ##
==========================================
- Coverage   94.21%   93.52%   -0.69%     
==========================================
  Files          21       21              
  Lines        2973     2998      +25     
  Branches      466      470       +4     
==========================================
+ Hits         2801     2804       +3     
- Misses        115      136      +21     
- Partials       57       58       +1     

Impacted Files	Coverage Δ
XmlSchemaClassGenerator/Generator.cs	76.92% <11.53%> (-11.28%)	:arrow_down:

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.

[mganss]

Thanks for creating the PR. I'm willing to merge. Could you just add a simple test to keep the coverage?