Ovp-search

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* Implement User search
* Implement order_by on Project search

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Skipped

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* Upgrade ovp-projects to 1.1.9

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* Upgrade dependencies

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* Fix maps api language on tests(not totally fixed by last release)

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* Fix maps api language on tests(override settings.py definition)
* Use both "locality" and "administrative_area_level_2" as city indicator
* Test signals using "administrative_area_level_2" as filter instead of "locality"
* Fix query optimization on ProjectSearchResource(missing owner on prefetch_related)