Upgrade RBE Docker image (#129)

Upgrade image used in RBE builds

Author: vmax

BUILD

@@ -27,7 +27,7 @@ platform(
     remote_execution_properties = """
         properties: {
             name: "container-image"
-            value: "docker://gcr.io/grakn-dev/rbe_platform@sha256:c64a67d102e1842563f46c0be534a52e0138e5ec90bf74e2047471019e107bc6"
+            value: "docker://gcr.io/grakn-dev/rbe_platform@sha256:435403f84a20db7ac779bf2688dce6bd6463d62608c0731cfb944cd0b74b35d8"
         }
         properties: {
           name: "dockerNetwork"
@@ -40,4 +40,4 @@ py_library(
     name = "common",
     srcs = ["common.py"],
     visibility = ["//visibility:public"]
-)
+)

ci/rbe-image/Dockerfile

@@ -1,2 +1,2 @@
-FROM gcr.io/cloud-marketplace/google/rbe-ubuntu16-04@sha256:94d7d8552902d228c32c8c148cc13f0effc2b4837757a6e95b73fdc5c5e4b07b
-RUN apt-get update && apt-get install -y rpm
+FROM gcr.io/cloud-marketplace/google/rbe-ubuntu16-04@sha256:5464e3e83dc656fc6e4eae6a01f5c2645f1f7e95854b3802b85e86484132d90e
+RUN apt-get update && apt-get install -y rpm