Fix descriptions for Devices Configurations methods in SwaggerUI

[lorthirk]

Just a small fix for a few descriptions in Devices resource (Configuration methods specifically) in SwaggerUI

Related Issue
This PR fixes #2229

[Coduz]

Please rebase on the latest develop

[codecov]

Codecov Report

Merging #2233 into develop will increase coverage by 0.11%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             develop   #2233      +/-   ##
============================================
+ Coverage      57.29%   57.4%   +0.11%     
  Complexity      1584    1584              
============================================
  Files           1071    1071              
  Lines          26010   26010              
  Branches        2299    2299              
============================================
+ Hits           14902   14932      +30     
+ Misses         10133   10096      -37     
- Partials         975     982       +7

Impacted Files	Coverage Δ	Complexity Δ
...ua/broker/core/listener/DeviceMessageListener.java	42.22% <0%> (-6.67%)	0% <0%> (ø)
...plugin/authentication/UserAuthenticationLogic.java	73.63% <0%> (-1.82%)	0% <0%> (ø)
.../broker/core/plugin/KapuaSecurityBrokerFilter.java	74.75% <0%> (-0.33%)	0% <0%> (ø)
...a/kura/simulator/generator/GeneratorScheduler.java	78.12% <0%> (+18.75%)	0% <0%> (ø)	⬇️
...ipse/kapua/kura/simulator/generator/Generator.java	100% <0%> (+33.33%)	0% <0%> (ø)	⬇️
...pua/kura/simulator/app/data/PeriodicGenerator.java	61.4% <0%> (+36.84%)	0% <0%> (ø)	⬇️
...clipse/kapua/kura/simulator/generator/Payload.java	50% <0%> (+50%)	0% <0%> (ø)	⬇️

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