Added builder implementations to the required thermal input models

[avgprog]

Resolves #165. Changes done -

1. Added CylindricalStorageInputCopyBuilder, ThermalBusInputCopyBuilder and ThermalHouseInputCopyBuilder to classes CylindricalStorageInput, ThermalBusInput and ThermalHouseInput respectively.

Next, I will work on test cases and code refinement.

[avgprog]

Added test cases to check the builder implementations added to the thermal input models.

[codecov]

Codecov Report

Merging #270 (01ba298) into dev (1b2a578) will increase coverage by 0.17%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                dev     #270      +/-   ##
============================================
+ Coverage     78.13%   78.31%   +0.17%     
- Complexity     1938     1941       +3     
============================================
  Files           246      246              
  Lines          7839     7885      +46     
  Branches        746      746              
============================================
+ Hits           6125     6175      +50     
+ Misses         1297     1293       -4     
  Partials        417      417              

Impacted Files	Coverage Δ	Complexity Δ
.../models/input/thermal/CylindricalStorageInput.java	85.24% <0.00%> (+11.56%)	11.00% <0.00%> (ø%)
...tamodel/models/input/thermal/ThermalUnitInput.java	56.00% <0.00%> (+13.89%)	4.00% <0.00%> (ø%)
...amodel/models/input/thermal/ThermalHouseInput.java	76.31% <0.00%> (+22.14%)	6.00% <0.00%> (+1.00%)
...atamodel/models/input/thermal/ThermalBusInput.java	88.88% <0.00%> (+22.22%)	3.00% <0.00%> (+1.00%)

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