Cannot disable traditional access control for ro_community{,6}

[olifre]

Affected Puppet, Ruby, OS and module versions/distributions

• Puppet: 5.5.22
• Module version: 5.1.1

How to reproduce (e.g Puppet code you use)

I am unable to disable traditional access control (I would prefer to use VACM only).
init.pp reads:

puppet-snmp/manifests/init.pp

Lines 251 to 252 in 008aebb

	Variant[Undef, String[1], Array[String[1]]] $ro_community = 'public',
	Variant[Undef, String[1], Array[String[1]]] $ro_community6 = 'public',

Since both parameters have a default value, this means undef can never be set (see e.g. the explanation at https://tickets.puppetlabs.com/browse/PUP-5295?focusedCommentId=222655&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-222655 ), which in turn means traditional access control can not be disabled.