health-check: Adding memory performance report

This commit is using sysbench to analyze the performance of the memory
by checking several block size and from all the logical CPUs.

This could be useful to detect a processor that doesn't reach the memory at the proper speed.
NUMA systems could be affected by such behavior.

This component will help at discovering this effect.

A typical output is like :
 ('cpu', 'logical_0', 'bandwidth_1K', '3017'),
 ('cpu', 'logical_0', 'bandwidth_4K', '7037'),
 ('cpu', 'logical_0', 'bandwidth_1M', '10400'),
 ('cpu', 'logical_0', 'bandwidth_16M', '8859'),
 ('cpu', 'logical_0', 'bandwidth_128M', '9042'),
 ('cpu', 'logical_0', 'bandwidth_1G', '9012'),
 ('cpu', 'logical_1', 'bandwidth_1K', '2718'),
 ('cpu', 'logical_1', 'bandwidth_4K', '7048'),
 ('cpu', 'logical_1', 'bandwidth_1M', '10670'),
 ('cpu', 'logical_1', 'bandwidth_16M', '8764'),
 ('cpu', 'logical_1', 'bandwidth_128M', '8716'),
 ('cpu', 'logical_1', 'bandwidth_1G', '8987'),
 ('cpu', 'logical_2', 'bandwidth_1K', '3066'),
 ('cpu', 'logical_2', 'bandwidth_4K', '6913'),
 ('cpu', 'logical_2', 'bandwidth_1M', '10502'),
 ('cpu', 'logical_2', 'bandwidth_16M', '8884'),
 ('cpu', 'logical_2', 'bandwidth_128M', '8986'),
 ('cpu', 'logical_2', 'bandwidth_1G', '8853'),
 ('cpu', 'logical_3', 'bandwidth_1K', '3049'),
 ('cpu', 'logical_3', 'bandwidth_4K', '6969'),
 ('cpu', 'logical_3', 'bandwidth_1M', '10423'),
 ('cpu', 'logical_3', 'bandwidth_16M', '8878'),
 ('cpu', 'logical_3', 'bandwidth_128M', '8927'),
 ('cpu', 'logical_3', 'bandwidth_1G', '8663'),
 ('cpu', 'logical', 'bandwidth_1K', '3010'),
 ('cpu', 'logical', 'bandwidth_4K', '7000'),
 ('cpu', 'logical', 'bandwidth_1M', '10580'),
 ('cpu', 'logical', 'bandwidth_16M', '8704'),
 ('cpu', 'logical', 'bandwidth_128M', '8838'),
 ('cpu', 'logical', 'bandwidth_1G', '8941')