"test_13" example:
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* Description: a periodic threads send data to two others periodic threads

* One deployement are provided, ping-local deploys one node, the two 
threads are on the same node.

* Compilation: issue "make" in the root directory

* Run: tsim-erc32 node_a

 fusion options : -f node_a -t1 pinger -t2 ping_me

NOTE : fail because of po-hi-ada specific restrictions

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tests :
* fusion of connected periodic threads
* external connection
* same priorities [to change]