Merge pull request #9 from benmoran56/master

Added initial agentless check for MDADM RAID arrays.
Fix error message when getting disk data fail

The error message says "Error : cannot fetch *cpu* stats values from host" but the check is about *disk* stats.
Merge pull request #10 from yanc0/patch-1

Fix error message when getting disk data fail
Add ssh port in command line option.
Merge pull request #12 from 2cadz/master

Add ssh port in command line option.
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