if a class doesn't exist, create it before trying to define an index on it.
look up the super class by name
Merge branch 'master' of github.com:tinkerpop/blueprints into create_class_before_index
more descriptive variable name
use the schema that was looked up previously
Merge pull request #406 from Amicus/create_class_before_index

Create class before index
OrientDB: supported Fetch Plan in Query