(FACT-1661) Add Solaris LDom detector

[caseywilliams]

Adds a detector function for Solaris LDoms that is called on sparc
platforms only. Relies on the virtinfo executable (like facter).
Example output:

  ldom => {
    chassis_serial => "AK00358110",
    control_domain => "opdx-a0-sun2",
    domain_name => "sol11-2",
    domain_uuid => "f6c6e7ba-9092-42b2-9604-8ff289bb712a",
    role_control => false,
    role_io => false,
    role_root => false,
    role_service => false
  }

This will need another PR to puppet-agent once merged so that the agent will actually build whereami on Solaris - it worked in a test build I did today.

[coveralls]

Coverage decreased (-1.03%) to 93.605% when pulling 4f45926 on caseywilliams:ldom-detector into d564198 on puppetlabs:master.

[coveralls]

Coverage decreased (-1.03%) to 93.605% when pulling 74a8ecd on caseywilliams:ldom-detector into d564198 on puppetlabs:master.

[caseywilliams]

Coverage keeps going down for these commits that rely on checking for some external executable - if anyone has ideas about how to make these more thoroughly testable, I'm all ears.

[branan]

I think as long as we have good coverage of the parse functions, I'm not too worried about losing a bit of coverage around actually calling each executable. Such is life.

[branan]

It'd be good to have a fixture for virtinfo output on a non-ldom host. We can talk to ops if we don't have access to such a thing directly. Other than that I'm 👍 to this after a rebaes

[caseywilliams]

@branan rebased and updated with some virtinfo output from an LDom control machine. When LDoms aren't available (e.g. on x86), the virtinfo -a -p flags aren't available either; Those will automatically be counted as negative results when the command fails - I can't really write a test for that case, though.

[coveralls]

Coverage decreased (-0.6%) to 91.087% when pulling a6a3327 on caseywilliams:ldom-detector into abd5e9f on puppetlabs:master.

[coveralls]

Coverage decreased (-0.6%) to 91.087% when pulling a6a3327 on caseywilliams:ldom-detector into abd5e9f on puppetlabs:master.

[branan]

This looks good now, once it's rebased 👍

[coveralls]

Coverage decreased (-0.5%) to 91.005% when pulling 10aca09 on caseywilliams:ldom-detector into 4094cee on puppetlabs:master.