*** TEST KEY 03 ***
Init - pthread_key_create with NULL destructor - OK
Init - pthread_create - OK
Init - sleep - let thread run - OK
Test_Thread - pthread_setspecific - OK
Test_Thread - pthread_exit to run key destructors - OK
Init - pthread_key_delete - OK
Init - pthread_key_create with non-NULL destructor - OK
Init - pthread_create - OK
Init - sleep - let thread run - OK
Test_Thread - pthread_setspecific - OK
Test_Thread - pthread_exit to run key destructors - OK
Init - verify destructor did NOT ran
Init - pthread_key_delete - OK
*** END OF TEST KEY 03 ***