Fix Observation spec failure in bulk test run
Fix Observation spec failure in bulk test run

* Use time_observed_at_in_zone instead of Time.use_zone to avoid
  weird interaction with ObservationsController tests
* Use eq(14) instead of be(14) for equality test

calonso-conabio/inaturalist,calonso-conabio/inaturalist,lucas-ez/inaturalist,alexshepard/inaturalist,pleary/inaturalist,calonso-conabio/inaturalist,HotFusionMan/inaturalist,lucas-ez/inaturalist,loarie/inaturalist,HotFusionMan/inaturalist,calonso-conabio/inaturalist,alexshepard/inaturalist,loarie/inaturalist,inaturalist/inaturalist,loarie/inaturalist,calonso-conabio/inaturalist,inaturalist/inaturalist,pleary/inaturalist,loarie/inaturalist,pleary/inaturalist,HotFusionMan/inaturalist,HotFusionMan/inaturalist,lucas-ez/inaturalist,pleary/inaturalist,loarie/inaturalist,alexshepard/inaturalist,inaturalist/inaturalist,alexshepard/inaturalist,pleary/inaturalist,inaturalist/inaturalist,HotFusionMan/inaturalist,inaturalist/inaturalist,lucas-ez/inaturalist,lucas-ez/inaturalist,alexshepard/inaturalist