fix regression in speed meta1 4-7

d54a707b393fd8b5539b3d6f0573dcd5226a5214
73m45.983s
4x8 meta1 ./scripts/development/run-argonnite-1.sh

this commit
42m2.639s
4x7 meta1 ./scripts/development/run-argonnite-1.sh

Link: https://github.com/GeneAssembly/biosal/issues/322
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>