MML Issue 567: Disallow Commercial Armor for BattleMeks

[SJuliez]

Fixes MML's 567 by removing Commercial Armor from the available armors for BattleMeks (only allowing them for Industrial Meks). The forum thread linked in the issue seems to have a pretty final statement from xotl on that matter. The actual change is lines 101 and 112, the rest is only a bit of renaming for readability.

[codecov]

Codecov Report

Merging #3485 (b38b313) into master (36b96f9) will not change coverage.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##             master    #3485   +/-   ##
=========================================
  Coverage     22.67%   22.67%           
  Complexity     4770     4770           
=========================================
  Files          2081     2081           
  Lines        243767   243767           
  Branches      45591    45591           
=========================================
  Hits          55265    55265           
  Misses       187013   187013           
  Partials       1489     1489           

Impacted Files	Coverage Δ
megamek/src/megamek/common/verifier/TestMech.java	0.00% <0.00%> (ø)

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