move expect into it-block for onto-controller spec

expect (and also response) should only be used inside of
an examples. Examples are the content of `it`-blocks.
`context`-blocks do not represent examples.
Merge pull request #808 from ontohub/fix_ontologies_controller_spec

move expect into it-block for onto-controller spec
Merge branch 'staging' into 765-references_in_distributed_ontologies