19472: Syncs salt installer's main branch with commit 1e0108e1a Arvados-DCO-1.1-Signed-off-by: Lucas Di Pentima <lucas.dipentima@curii.com>
18983: Disable LocalKeepBlobBuffersPerVCPU on the multinode installer development config. Arvados-DCO-1.1-Signed-off-by: Ward Vandewege <ward@curii.com>
16375: Add multinode testing code Arvados-DCO-1.1-Signed-off-by: Javier Bértoli <jbertoli@curii.com>