Update googlemaps api version to v3.32

[VictorVelarde]

There are some internal references to googlemaps api v3.30 inside the application, that should be updated (e.g. app/views/shared/_google_maps.html.erb).

We should upgrade to the current stable version.

As a reference, we have recently updated carto.js v4 and dealed with some related issues (see for example: CartoDB/carto.js#2067)

[VictorVelarde]

From 2018/05/16, v3.32 is the stable version, so that's the update to apply inside these files

[VictorVelarde]

This should be coordinated with the update in carto.js. See CartoDB/carto.js#2126

[VictorVelarde]

@ivanmalagon I think we should upgrade these internal hardcoded references, once carto.js is working as expected with current gmaps stable version (v.3.32)

_google_maps.html.erb seems now to be unused (should we delete it?), but static.js is being used indeed.

I have created #14146 to deal with this update.

[ivanmalagon]

We haven't run into any problem lately with 3.32 so... go ahead!

[VictorVelarde]

@ramiroaznar this was nearly finished some days ago, could you include it in the current RT?

[VictorVelarde]

Shipped to prod 🚀