fixed race condition in test assembly name generation
fixed race condition in test assembly name generation

cubeme/ssharp,isse-augsburg/ssharp,cubeme/ssharp,isse-augsburg/ssharp,isse-augsburg/ssharp,maul-esel/ssharp,maul-esel/ssharp,cubeme/ssharp,isse-augsburg/ssharp,maul-esel/ssharp,isse-augsburg/ssharp,maul-esel/ssharp