Added CUnit test cases for webcfg_rbus.c

[D-Thanusha]

No description provided.

[codecov]

Codecov Report

Merging #189 (8ddfbd1) into master (952f2f5) will increase coverage by 11.39%.
Report is 3 commits behind head on master.
The diff coverage is 90.93%.

@@             Coverage Diff             @@
##           master     #189       +/-   ##
===========================================
+ Coverage   50.87%   62.27%   +11.39%     
===========================================
  Files          30       30               
  Lines        8135     8903      +768     
===========================================
+ Hits         4139     5544     +1405     
+ Misses       3996     3359      -637     

Files	Coverage Δ
src/webcfg_rbus.c	65.41% <100.00%> (+58.21%)	⬆️
tests/test_generic.c	100.00% <100.00%> (ø)
tests/test_rbus_fr.c	88.05% <89.58%> (+42.02%)	⬆️

... and 6 files with indirect coverage changes