Issue679 loader should use IoC

[eeverman]

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Fixes #679 (at least partially)

[codecov]

Codecov Report

Merging #708 (b813cb9) into main (88957c7) will increase coverage by 0.36%.
The diff coverage is 96.42%.

@@             Coverage Diff              @@
##               main     #708      +/-   ##
============================================
+ Coverage     87.99%   88.35%   +0.36%     
- Complexity     1187     1232      +45     
============================================
  Files           133      136       +3     
  Lines          3697     3736      +39     
  Branches        442      449       +7     
============================================
+ Hits           3253     3301      +48     
+ Misses          318      313       -5     
+ Partials        126      122       -4     

Impacted Files	Coverage Δ
...ndtail/andhow/load/PropFileOnFilesystemLoader.java	71.42% <ø> (ø)
...org/yarnandtail/andhow/load/std/StdJndiLoader.java	88.31% <ø> (+2.59%)	⬆️
...arnandtail/andhow/load/BaseKeyValuePairLoader.java	86.36% <86.36%> (ø)
.../yarnandtail/andhow/load/BaseFixedValueLoader.java	88.88% <88.88%> (ø)
...ava/org/yarnandtail/andhow/load/BaseMapLoader.java	95.23% <95.23%> (ø)
...c/main/java/org/yarnandtail/andhow/BaseConfig.java	87.09% <100.00%> (-1.14%)	⬇️
...rc/main/java/org/yarnandtail/andhow/StdConfig.java	87.50% <100.00%> (-3.64%)	⬇️
...nandtail/andhow/load/LoaderEnvironmentBuilder.java	100.00% <100.00%> (ø)
.../yarnandtail/andhow/load/LoaderEnvironmentImm.java	100.00% <100.00%> (ø)
...in/java/org/yarnandtail/andhow/load/MapLoader.java	100.00% <100.00%> (+6.89%)	⬆️
... and 10 more

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