Remove potentially unclear error message

[BrianJKoopman]

This should remove the potentially unclear message pointed out in #164. If we hit the timeout we just print a message about it, then move to the error raised if 'running' wasn't the found state:

sorunlib/src/sorunlib/_internal.py

Lines 129 to 132 in d5760b8

	if op_code != 3: # RUNNING
	error = f"Operation {op} in Agent {instance} is not 'running'.\n" + \
	f"Current OpCode: {op_code}\n" + str(response)
	raise RuntimeError(error)

@mhasself, does this clear things up?

Resolves #164.

[mhasself]

Looks good!