Merge pull request vitessio#2103 from michael-berlin/go17

Bump minimum Go version from 1.5 to 1.7.

.travis.yml

@@ -2,7 +2,7 @@
 sudo: false
 language: go
 go:
-  - 1.5
+  - 1.7
 addons:
   apt:
     sources:

doc/GettingStarted.md

@@ -73,7 +73,7 @@ OS X 10.11 (El Capitan) should work as well, the installation instructions are b
 
 In addition, Vitess requires the software and libraries listed below.
 
-1.  [Install Go 1.5+](http://golang.org/doc/install).
+1.  [Install Go 1.7+](http://golang.org/doc/install).
 
 2.  Install [MariaDB 10.0](https://downloads.mariadb.org/) or
     [MySQL 5.6](http://dev.mysql.com/downloads/mysql). You can use any

doc/GettingStartedKubernetes.md

@@ -9,13 +9,13 @@ The `kubectl` steps will apply to any Kubernetes cluster.
 
 ## Prerequisites
 
-To complete the exercise in this guide, you must locally install Go 1.5+,
+To complete the exercise in this guide, you must locally install Go 1.7+,
 Vitess' `vtctlclient` tool, and Google Cloud SDK. The
 following sections explain how to set these up in your environment.
 
-### Install Go 1.5+
+### Install Go 1.7+
 
-You need to install [Go 1.5+](http://golang.org/doc/install) to build the
+You need to install [Go 1.7+](http://golang.org/doc/install) to build the
 `vtctlclient` tool, which issues commands to Vitess.
 
 After installing Go, make sure your `GOPATH` environment

docker/bootstrap/Dockerfile.common

@@ -1,4 +1,4 @@
-FROM golang:1.5
+FROM golang:1.7
 
 # Install Vitess build dependencies
 RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \