Duplicate test cases added to test cycle.

[Devesh Dobriyal]

Steps to reproduce:-
1. Create Test_Cycle1 (Test_suite1)

2.Create Test_Cycle2 with (Test_Suite2)
where Test_Cycle1_Name= Test_Cycle2_Name
And Test_Cycle1 (Test_Suite1)= Test_Cycle2 (Test_Suite2)

3. Delete Test Cycle2.

4. Duplicate tests would be added to Test Cycle1.
Test_Cycle1 = Test_suite1+ Test_suite2

Expected behavior :-
Test_Cycle1 = Test_suite1.

BUG/Actual Behavior:-
Test_Cycle1 = Test_suite1+ Test_suite2