Options to use sudo and specify path to MegaCli binary

[rmrustem]

Pull Request Checklist

Is this in reference to an existing issue?

General

• Update Changelog following the conventions laid out here

• Update README with any necessary configuration snippets

• Binstubs are created if needed

• RuboCop passes

• Existing tests pass

New Plugins

• Tests

• Add the plugin to the README

• Does it have a complete header as outlined here

Purpose

• Running the whole check with sudo may not be the optimal solution, so this PR adds an option to call specific commands and options with sudo.
• Option to specify path to the MegaCli binary is added, as it can be installed into different location depending on the packages used.

Known Compatibility Issues