Updating latest to RethinkDB 2.1.5
Updating latest to RethinkDB 2.1.5

Released new version of 2.1.5 this morning. CC: @pires @coffeemug @danielmewes
pesho/docker-official-images,chorrell/official-images,docker-library/official-images,mattrobenolt/official-images,neo-technology/docker-official-images,docker-flink/official-images,emilevauge/official-images,dinogun/official-images,thresheek/official-images,emilevauge/official-images,neo-technology/docker-official-images,docker-solr/official-images,thresheek/official-images,mattrobenolt/official-images,thresheek/official-images,docker-solr/official-images,dinogun/official-images,benbc/docker-official-images,mattrobenolt/official-images,benbc/docker-official-images,emilevauge/official-images,benbc/docker-official-images,docker-library/official-images,mattrobenolt/official-images,mattrobenolt/official-images,infosiftr/stackbrew,31z4/official-images,docker-library/official-images,neo-technology/docker-official-images,31z4/official-images,jperrin/official-images,thresheek/official-images,davidl-zend/official-images,infosiftr/stackbrew,jperrin/official-images,dinogun/official-images,nodejs-docker-bot/official-images,robfrank/official-images,nodejs-docker-bot/official-images,chorrell/official-images,neo-technology/docker-official-images,docker-library/official-images,emilevauge/official-images,nodejs-docker-bot/official-images,chorrell/official-images,docker-flink/official-images,31z4/official-images,davidl-zend/official-images,docker-library/official-images,emilevauge/official-images,thresheek/official-images,docker-flink/official-images,docker-library/official-images,infosiftr/stackbrew,pesho/docker-official-images,chorrell/official-images,neo-technology/docker-official-images,davidl-zend/official-images,mattrobenolt/official-images,jperrin/official-images,chorrell/official-images,jperrin/official-images,dinogun/official-images,docker-solr/official-images,dinogun/official-images,thresheek/official-images,neo-technology/docker-official-images,thresheek/official-images,pesho/docker-official-images,infosiftr/stackbrew,davidl-zend/official-images,robfrank/official-images,jperrin/official-images,31z4/official-images,thresheek/official-images,benbc/docker-official-images,infosiftr/stackbrew,31z4/official-images,benbc/docker-official-images,docker-flink/official-images,chorrell/official-images,chorrell/official-images,jperrin/official-images,chorrell/official-images,robfrank/official-images,neo-technology/docker-official-images,docker-solr/official-images,pesho/docker-official-images,emilevauge/official-images,docker-library/official-images,chorrell/official-images,robfrank/official-images,pesho/docker-official-images,31z4/official-images,31z4/official-images,docker-flink/official-images,neo-technology/docker-official-images,dinogun/official-images,mattrobenolt/official-images,thresheek/official-images,jperrin/official-images,mattrobenolt/official-images,jperrin/official-images,davidl-zend/official-images,benbc/docker-official-images,31z4/official-images,31z4/official-images,emilevauge/official-images,emilevauge/official-images,robfrank/official-images,mattrobenolt/official-images,dinogun/official-images,31z4/official-images,nodejs-docker-bot/official-images,infosiftr/stackbrew,dinogun/official-images,pesho/docker-official-images,mattrobenolt/official-images,dinogun/official-images,thresheek/official-images,docker-solr/official-images,docker-flink/official-images,pesho/docker-official-images,emilevauge/official-images,dinogun/official-images,nodejs-docker-bot/official-images,31z4/official-images,pesho/docker-official-images,docker-solr/official-images,davidl-zend/official-images,docker-library/official-images,davidl-zend/official-images,docker-flink/official-images,emilevauge/official-images,infosiftr/stackbrew,mattrobenolt/official-images,neo-technology/docker-official-images,robfrank/official-images,neo-technology/docker-official-images,infosiftr/stackbrew,neo-technology/docker-official-images,robfrank/official-images,chorrell/official-images,chorrell/official-images,nodejs-docker-bot/official-images,docker-library/official-images,pesho/docker-official-images,docker-flink/official-images,infosiftr/stackbrew,docker-library/official-images,docker-flink/official-images,neo-technology/docker-official-images,davidl-zend/official-images,31z4/official-images,neo-technology/docker-official-images,nodejs-docker-bot/official-images,emilevauge/official-images,docker-solr/official-images,thresheek/official-images,chorrell/official-images,davidl-zend/official-images,davidl-zend/official-images,nodejs-docker-bot/official-images,benbc/docker-official-images,docker-solr/official-images,dinogun/official-images,nodejs-docker-bot/official-images,thresheek/official-images,nodejs-docker-bot/official-images,dinogun/official-images,jperrin/official-images,robfrank/official-images,docker-library/official-images,docker-library/official-images,31z4/official-images,docker-solr/official-images,docker-library/official-images,pesho/docker-official-images,emilevauge/official-images,docker-flink/official-images,mattrobenolt/official-images,infosif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