Use contain instead of anchor pattern

[alexjfisher]

No description provided.

[ekohl]

I'm still a bit unclear about whether class {} implies contain or if it doesn't. Given the old code also used anchors with class {} I think this is fine even if it does turn out to be redundant.

[mmoll]

merged, thanks @alexjfisher!

[alexjfisher]

@ekohl classes aren’t implicitly contained when you use class {}

https://puppet.com/docs/puppet/5.5/lang_containment.html#the-contain-function

To contain classes that are declared with the resource-like declaration syntax, use the contain function after declaring the class

[ekohl]

@alexjfisher Thanks, that's great to get confirmed.