Fix some bugs in CHybridMethodODE45

-Add mMethod and setupMethod() to verify which method is used
-Modify Stochastic Method in function doSingleStep()

	modified:   copasi/trajectory/CHybridMethodODE45.cpp
	modified:   copasi/trajectory/CHybridMethodODE45.h
Fix one bug appearing in pure stochastic part of CHybridMethodODE45

	modified:   stochastic-testsuite/run.sh