multiple points is not returned in Roads speed_limits

[vanitu]

I've found that Roads api method "speed_limits" returns just one limit, which is only for last placeId in array.

`
path=["ChIJvcoGi0CuEmsRiNyOd0yS3jM", "ChIJvcoGi0CuEmsRidyOd0yS3jM", "ChIJVYG98UCuEmsRMIWO5md9ARM"]

@gmaps.speed_limits(path)
=> [{:placeId=>"ChIJVYG98UCuEmsRMIWO5md9ARM", :speedLimit=>40, :units=>"KPH"}]
`

Quick investigation shows that query cut at Hurley stage. As @edwardsamuel is already in process to exchange Hurley inside develop branch. fix is coming.

Proposal do add check on number of retuned locations in Rspec test.