performance: add scripts to run performance tests on a laptop

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
performance: increase the number of sent messages

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
quality: fix some compilation warnings with gcc 4.8.3

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
hash_table: add static to support private methods

Signed-off-by: George K. Thiruvathukal <gkt@cs.luc.edu>