(MODULES-9711) Consistently manage concat with no fragments

[seanmil]

When no concat_fragment resources are specified, concat_file
should manage an empty file. This resolves MODULES-9711 and
MODULES-7371.

[puppet-community-rangefinder]

concat_file is a type

Breaking changes to this file WILL impact these 1 modules (exact match):

• saz-ssh

Breaking changes to this file MAY impact these 1 modules (near match):

• puppetlabs-concat

This module is declared in 171 of 575 indexed public Puppetfiles.

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These results were generated with Rangefinder, a tool that helps predict the downstream impact of breaking changes to elements used in Puppet modules. You can run this on the command line to get a full report.

Exact matches are those that we can positively identify via namespace and the declaring modules' metadata. Non-namespaced items, such as Puppet 3.x functions, will always be reported as near matches only.