core: fix a bug in incremental resizing of hash table

THere is a bug in the core_map container. When incremental resizing is
in progress, a delete call on a key that was migrated to the "next"
container does not delete the key from the "current" container.

This patch fixes this.

$ performance/latency_probe/latency_probe -threads-per-node 31

PERFORMANCE_COUNTER node-count = 1
PERFORMANCE_COUNTER worker-count-per-node = 30
PERFORMANCE_COUNTER actor-count-per-worker = 100
PERFORMANCE_COUNTER worker-count = 30
PERFORMANCE_COUNTER actor-count = 3000
PERFORMANCE_COUNTER message-count-per-actor = 40000
PERFORMANCE_COUNTER message-count = 120000000
PERFORMANCE_COUNTER elapsed-time = 80.194436 s
PERFORMANCE_COUNTER computation-throughput = 1496363.159147 messages / s
PERFORMANCE_COUNTER node-throughput = 1496363.159147 messages / s
PERFORMANCE_COUNTER worker-throughput = 49878.771972 messages / s
PERFORMANCE_COUNTER worker-latency = 20048 ns
PERFORMANCE_COUNTER actor-throughput = 498.787720 messages / s
PERFORMANCE_COUNTER actor-latency = 2004860 ns

Link: https://github.com/GeneAssembly/biosal/issues/782
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
tests: add more performance tests with latency_probe

Link: https://github.com/GeneAssembly/biosal/issues/782
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
thorium_node: show debug mode in output

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
performance: don't show worker count in latency_probe

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
thorium: remove empty lines in multiplexer

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>