Added Test case for delete of course and units

[vaibhav0320]

Added redirection for delete_course and delete_unit

[codecov[bot]]

Codecov Report

Merging #221 into develop will increase coverage by 1.06%. The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #221      +/-   ##
===========================================
+ Coverage    91.97%   93.04%   +1.06%     
===========================================
  Files           37       39       +2     
  Lines         1383     1423      +40     
===========================================
+ Hits          1272     1324      +52     
+ Misses         111       99      -12     

Flag	Coverage Δ
#unittests	93.04% <100.00%> (+1.06%)	:arrow_up:

Impacted Files	Coverage Δ
flaskapp/blueprints/courses/routes.py	96.82% <100.00%> (+13.21%)	:arrow_up:
test/test_course.py	100.00% <100.00%> (ø)
test/test_unit.py	100.00% <100.00%> (ø)
flaskapp/blueprints/users/routes.py	91.57% <0.00%> (+1.05%)	:arrow_up:
flaskapp/blueprints/users/forms.py	98.18% <0.00%> (+1.81%)	:arrow_up:
flaskapp/models.py	97.59% <0.00%> (+2.40%)	:arrow_up:

[Niraj-Kamdar]

It may have some bug.Try to fix it if you can.

[Niraj-Kamdar]

Don't worry about restyled error that's just a bot performing style check and it will fix it in separate PR.

[Niraj-Kamdar]

I would like to merge it if it is complete

[Niraj-Kamdar]

Merged via PR #223