Add UT's for Controller

[asifdxtreme]

What type of PR is this?
/kind enhancement

What this PR does / why we need it:
Add UT's for Controller

[codecov-commenter]

Codecov Report

Merging #164 (1087ba3) into main (d9bdcbf) will increase coverage by 9.22%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #164      +/-   ##
==========================================
+ Coverage   61.37%   70.59%   +9.22%     
==========================================
  Files           6        6              
  Lines        1517     1517              
==========================================
+ Hits          931     1071     +140     
+ Misses        466      446      -20     
+ Partials      120        0     -120     

Flag	Coverage Δ
unittests	70.59% <ø> (+9.22%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/drivers/csi/csiutil.go	64.47% <0.00%> (+5.26%)	⬆️
pkg/drivers/cpi/cpiutil.go	88.67% <0.00%> (+5.66%)	⬆️
controllers/vspherecloudconfig_controller.go	57.57% <0.00%> (+9.09%)	⬆️
pkg/session/session.go	81.17% <0.00%> (+9.41%)	⬆️
controllers/vdoconfig_controller.go	69.59% <0.00%> (+9.50%)	⬆️
pkg/client/dynamic_client.go	75.00% <0.00%> (+10.60%)	⬆️

[aggarwalta]

LGTM, thanks!

[ridaz]

LGTM, Thanks.