3146: Fixing NPEs in Campaign::getForceFor to handle NPE raised from unit assignment.

[Windchild292]

This fixed #3146 and fixes the annotation setup that led to that issue.

[codecov]

Codecov Report

Merging #3148 (88ce57b) into master (d626b44) will decrease coverage by 0.04%.
The diff coverage is 36.11%.

@@             Coverage Diff              @@
##             master    #3148      +/-   ##
============================================
- Coverage      9.93%    9.89%   -0.05%     
+ Complexity     4062     4054       -8     
============================================
  Files           816      818       +2     
  Lines        112168   112075      -93     
  Branches      17200    17197       -3     
============================================
- Hits          11149    11086      -63     
+ Misses        99635    99600      -35     
- Partials       1384     1389       +5     

Impacted Files	Coverage Δ
MekHQ/src/mekhq/MekHqXmlUtil.java	11.96% <0.00%> (ø)
MekHQ/src/mekhq/Utilities.java	2.79% <0.00%> (-0.44%)	⬇️
MekHQ/src/mekhq/campaign/Campaign.java	12.03% <0.00%> (-0.03%)	⬇️
MekHQ/src/mekhq/campaign/finances/Loan.java	0.00% <0.00%> (ø)
MekHQ/src/mekhq/campaign/force/UnitStub.java	0.00% <0.00%> (ø)
MekHQ/src/mekhq/campaign/log/PersonalLogger.java	0.00% <0.00%> (ø)
MekHQ/src/mekhq/campaign/log/ServiceLogger.java	19.14% <0.00%> (-0.42%)	⬇️
...mpaign/market/unitMarket/AtBMonthlyUnitMarket.java	0.00% <0.00%> (ø)
...hq/campaign/mission/AtBDynamicScenarioFactory.java	1.59% <0.00%> (ø)
MekHQ/src/mekhq/campaign/mission/AtBScenario.java	0.00% <0.00%> (ø)
... and 64 more

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