Show process name during inspec output

[jcastillocano]

Testing a process resource I got this output:

  Processes list.length
     ✔  should eq 1

when I expected something like Processes mysqld. Using grep variable to verify the output:

  Processes mysqld
     ✔  users should cmp == "mysql"

or, when we use RegExp:

  Processes /mysqld_safe/
     ✔  users should cmp == "root"

I also added some unit tests to verify this behavior.

[chris-rock]

@jcastillocano great addition. Could you squash your commits and rebase it to master? I propose you fetch latest master and call git rebase -i master from your branch. Let me know if you need any help.

[chris-rock]

Thank you @jcastillocano for this contribution!