Resetting MultiExample.count to initial state 0

[sturmianseq]

This PR aims to improve test reliability of test test_multi by resetting MultiExample.count to initial state 0

The test can fail in this way if MultiExample.count is not reset

test_life_cycle.py::test_multi FAILED                                    [100%]
cynergy/tests/test_life_cycle.py:29 (test_multi)
4 != 2

Expected :2
Actual   :4
<Click to see difference>

def test_multi():
        assert_instance_of(MultiExample, 2)
>       assert_instance_of(MultiExample, 2)