Add MekLocation tests

[sixlettervariables]

This adds MekLocation unit tests and fixes tiny nits along the way.

TODO:

• getXXXTime and getXXXDifficulty
• needsFixing
• updateConditionFromPart
• fix
• checkFixable
• remove
• checkScrappable
• checkSalvagable
• doMaintenanceDamage
• getAllMods
• getDetails
• getDesc

[codecov]

Codecov Report

Merging #2331 (bc44167) into master (e85f9bb) will increase coverage by 0.31%.
The diff coverage is 94.54%.

@@             Coverage Diff              @@
##             master    #2331      +/-   ##
============================================
+ Coverage     10.58%   10.89%   +0.31%     
- Complexity     3548     3727     +179     
============================================
  Files           670      670              
  Lines         94682    94679       -3     
  Branches      15860    15850      -10     
============================================
+ Hits          10020    10315     +295     
+ Misses        83295    83006     -289     
+ Partials       1367     1358       -9     

Impacted Files	Coverage Δ	Complexity Δ
MekHQ/src/mekhq/gui/RepairTab.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
MekHQ/src/mekhq/gui/dialog/AcquisitionsDialog.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
MekHQ/src/mekhq/campaign/parts/MekLocation.java	89.33% <95.37%> (+58.62%)	224.00 <71.00> (+152.00)
MekHQ/src/mekhq/campaign/Warehouse.java	64.60% <100.00%> (+0.31%)	41.00 <0.00> (ø)
.../mekhq/campaign/universe/FactionBorderTracker.java	68.87% <0.00%> (-2.05%)	35.00% <0.00%> (-1.00%)
...Q/src/mekhq/campaign/universe/RegionPerimeter.java	83.33% <0.00%> (-0.70%)	39.00% <0.00%> (-1.00%)
MekHQ/src/mekhq/campaign/universe/Planet.java	26.07% <0.00%> (-0.23%)	25.00% <0.00%> (ø%)
MekHQ/src/mekhq/campaign/work/WorkTime.java	66.00% <0.00%> (ø)	7.00% <0.00%> (+1.00%)
...ekHQ/src/mekhq/campaign/market/ContractMarket.java	58.69% <0.00%> (ø)	113.00% <0.00%> (ø%)
MekHQ/src/mekhq/campaign/mission/AtBContract.java	19.52% <0.00%> (+0.11%)	67.00% <0.00%> (+1.00%)
... and 5 more

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[sixlettervariables]

I've only got the small tests left to do, but otherwise all of the major functionality of MekLocation is now tested.

[Windchild292]

@sixlettervariables just noticed this was unmerged. A few comments open and a merge conflict to fix, then this should be good to merge

[sixlettervariables]

@Windchild292 addressed. There were some odd merge conflicts in un-changed parts of the code (Acquisition dialog), but I have those resolved.