Change indentation for custom_fragments to align with global

[jjarokergc]

Summary

This formats custom_fragments to align with global and default sections.

Additional Context

This change allows...

  class { 'haproxy':

    custom_fragment  => "cache mycache \n  total-max-size 4095 \n  max-object-size 10000 \n  max-age 30",
    global_options   => {...
    defaults_options => {...
}

...to generate haproxy.cfg:

global
  ...
defaults
  ...
cache mycache 
  total-max-size 4095 
  max-object-size 10000 
  max-age 30

Related Issues (if any)

See #582

Checklist

• 🟢 Spec tests.
• 🟢 Acceptance tests.
• [ x ] Manually verified. (For example puppet apply)