add test for missing samples and flush h5 tables after appending to avoid warnind
add test for missing samples and flush h5 tables after appending to avoid warnind

bmvdgeijn/WASP,bmvdgeijn/WASP,bmvdgeijn/WASP,bmvdgeijn/WASP,gmcvicker/WASP,gmcvicker/WASP,gmcvicker/WASP,gmcvicker/WASP