Update examples: name to measurement

[koppor]

According to issue influxdata/influxdb#2564, the name field has been renamed to the measurementfield.

The current examples give the output "missing measurement".

I know, it's trivial, but starting users might get confused when starting to try the python library.

[defreng]

Thank you, ran into this problem :-)

[aviau]

There is much more than examples to update.

As you can see in influxdata/influxdb#2564, the update didn't work for me and this is why I didn't update the library.

I'll test with 0.9

[aviau]

This was fixed in master