Feature specs should ensure xcode is closed before running

This also occurs at the end of the apple script, but it would be nice to
have some guarantee that earlier runs that fail do not break the following
specs
Click on 'allow testing host application apis' for xcode6

Feature specs now pass on xcode 5 and 6.
Remove xcuserdata from template-projects for cucumber specs

This is some global state that would be nice to remove since it is a
possible place where CI and dev machines can get out of sync.