add initial plugin for checking LSI/Engenio/E-Series/etc storage using santricity CLI

SYS-2169 #comment added an initial plugin for checking LSI storage
add disk pool capacity thing, remove debug
reenable dumper debug for critical, add degraded drive path message
add another path for Dell MDSS
really Dell, really?!
remove the debug dumper stuff and output whatever we get from SMcli all the time
move to root of repo instead of local tree