timers_unix: Fix termination problem of WaitReceiveTaskEnd

The function pthread_kill sends the Signal thread and to the own process.
If you use this construct than the application which calls uses the
canfestival api will terminate at the call of canClose. To avoid that
use pthread_cancel instead of pthread_kill. To use the pthread_cancel call
you need to set the cancel ability in the thread function. That means
you need to call pthread_setcancelstate and pthread_setcanceltype.
For the termination of the thread at any time it is important to set the
cancel type to PTHREAD_CANCEL_ASYNCHRONOUS.

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#include "TestMaster.h"

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void TestMaster_heartbeatError(CO_Data* d, UNS8);

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UNS8 TestMaster_canSend(Message *);

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void TestMaster_initialisation(CO_Data* d);

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void TestMaster_preOperational(CO_Data* d);

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void TestMaster_operational(CO_Data* d);

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void TestMaster_stopped(CO_Data* d);

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void TestMaster_post_sync(CO_Data* d);

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void TestMaster_post_TPDO(CO_Data* d);

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void TestMaster_post_emcy(CO_Data* d, UNS8 nodeID, UNS16 errCode, UNS8 errReg);

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void TestMaster_post_SlaveBootup(CO_Data* d, UNS8 nodeid);