Fix inaccurate step definition
Fix inaccurate step definition

Step def appears to check against user defined class - In reality always checking against String.

Change fixes this and also adds support for nested classes.

ffleming/httparty,jnunemaker/httparty,ffleming/httparty,jnunemaker/httparty,ffleming/httparty,jnunemaker/httparty