FEATURE: Add optional node type inheritance to CreateNodePrivilege

[ComiR]

This is a rebased version of #2166 targeting master.

If you define a matcher like createdNodeIsOfType("Some.Package:Mixin"), the creation of a node using this mixin should match. Currently only the final NodeType is checked (ignoring inheritance). Imho here we should do the same inheritance checks as everywhere else.

I still suggest looking into the privilege system, since there are some inconsistencies.

Resolves: #3136

[jonnitto]

This will fix #3136

[kdambekalns]

Close/re-open to trigger new Travis integration

[albe]

Can someone do a rebase of this?