Merge branch '4-implement-missing-smtp-parameters' into 'master'

Resolve "Implement missing SMTP parameters"

Closes #4

See merge request amies/puppet-amies!2
3 jobs for 6-remove-useless-parameters in 3 minutes and 53 seconds (queued for 1 second)
Status Job ID Name Coverage
  Syntax
passed #15663
syntax lint metadata_lint check:symlinks check:git_ignore check:dot_underscore check:test_file rubocop-Ruby 2.5.3-Puppet ~> 6

00:01:13

 
  Unit
passed #15665
parallel_spec-Ruby 2.4.5-Puppet ~> 5

00:02:32

passed #15664
parallel_spec-Ruby 2.5.3-Puppet ~> 6

00:02:39