Merge pull request #10309 from menghanl/go_version

update go version in Dockerfile to latest

templates/tools/dockerfile/interoptest/grpc_interop_go/Dockerfile.template

@@ -29,7 +29,7 @@
   # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   
-  FROM golang:1.5
+  FROM golang:latest
   
   <%include file="../../go_path.include"/>
   <%include file="../../python_deps.include"/>

templates/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile.template

@@ -29,7 +29,7 @@
   # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   
-  FROM golang:1.5
+  FROM golang:latest
   
   <%include file="../../go_path.include"/>
   <%include file="../../python_deps.include"/>

templates/tools/dockerfile/stress_test/grpc_interop_stress_go/Dockerfile.template

@@ -29,7 +29,7 @@
   # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   
-  FROM golang:1.5
+  FROM golang:latest
   
   <%include file="../../gcp_api_libraries.include"/>
   <%include file="../../python_deps.include"/>

tools/dockerfile/interoptest/grpc_interop_go/Dockerfile

@@ -27,7 +27,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-FROM golang:1.5
+FROM golang:latest
 
 # Using login shell removes Go from path, so we add it.
 RUN ln -s /usr/local/go/bin/go /usr/local/bin

tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile

@@ -27,7 +27,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-FROM golang:1.5
+FROM golang:latest
 
 # Using login shell removes Go from path, so we add it.
 RUN ln -s /usr/local/go/bin/go /usr/local/bin

tools/dockerfile/stress_test/grpc_interop_stress_go/Dockerfile

@@ -27,7 +27,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-FROM golang:1.5
+FROM golang:latest
 
 # Google Cloud platform API libraries
 RUN apt-get update && apt-get install -y python-pip && apt-get clean