Minor pep8 E251 fixes in 3 example files
Fix resource.name backward compatibility regression

Changes around 'name' atrributes were needed of the OpenStack feature.
This fix restores the use of 'resource.name' for non-OpenStack usage.
Revert some of the name->title changes
Tweaked a few integer validation messages

* Added exception message to positive_integer validation
* Take advantage of "integer" method for int() casting
* Added exception message to network_port range validation