Add python to bazel's dockerfiles

Since 4c55898 bazel requires python to run create_embedded_tools. This cl
adds it to the affected Dockerfiles. Not to the debian one, since debian has
'python' binary there by default. While add it, sort the packages logically.

RELNOTES: None.
PiperOrigin-RevId: 164574914

Author: hlopko

site/docs/install-compile-source.md

@@ -7,9 +7,10 @@ title: Compile Bazel from Source
 
 ## <a name="unix"></a> On Linux or macOS
 
-1. Ensure that you have OpenJDK 8 installed on your system.
+1. Ensure that you have OpenJDK 8 and python installed on your system.
    For a system based on debian packages (e.g. Debian, Ubuntu), install
-   OpenJDK 8 by running the command `sudo apt-get install openjdk-8-jdk`.
+   OpenJDK 8 and python by running the command `sudo apt-get install
+   openjdk-8-jdk python`.
 
 2. The standard way of compiling a release version of Bazel from source is to
    use a distribution archive. Download `bazel-<VERSION>-dist.zip` from the

src/test/docker/Dockerfile.centos6.7

@@ -3,10 +3,11 @@ FROM centos:centos6.7
 RUN yum -y upgrade
 
 RUN yum -y install \
-    java-1.8.0-openjdk-devel \
-    wget which findutils binutils gcc tar gzip \
-    zip unzip java java-devel git clang zlib-devel \
-    gcc-c++
+    wget which git findutils binutils \
+    zip unzip tar gzip zlib-devel \
+    clang gcc gcc-c++ \
+    java java-devel java-1.8.0-openjdk-devel \
+    python
 
 RUN wget http://people.centos.org/tru/devtools-2/devtools-2.repo -O /etc/yum.repos.d/devtools-2.repo
 RUN yum -y install devtoolset-2-gcc devtoolset-2-gcc-c++ devtoolset-2-binutils

src/test/docker/Dockerfile.debian-stretch

@@ -1,9 +1,8 @@
 FROM debian:stretch
 RUN apt-get update
-RUN apt-get install -y --no-install-recommends curl ca-certificates \
-      unzip build-essential \
-      git pkg-config zip unzip \
-      g++ gcc openjdk-8-jdk \
-      zlib1g-dev libarchive-dev \
-      ca-certificates-java && \
+RUN apt-get install -y --no-install-recommends \
+      curl ca-certificates ca-certificates-java \
+      git pkg-config build-essential \
+      zip unzip zlib1g-dev libarchive-dev \
+      g++ gcc openjdk-8-jdk && \
     apt-get clean

src/test/docker/Dockerfile.fedora23

@@ -2,7 +2,8 @@ FROM fedora:23
 
 RUN dnf -y update && dnf clean all
 RUN dnf -y install \
-    which findutils binutils gcc tar gzip \
-    zip unzip java java-devel git clang zlib-devel \
+    which findutils binutils gcc tar git \
+    gzip zip unzip zlib-devel \
+    clang java java-devel python \
     && dnf clean all
 ENV JAVA_HOME /usr/lib/jvm/java-openjdk

src/test/docker/Dockerfile.ubuntu-15.04

@@ -1,8 +1,8 @@
 FROM ubuntu:15.04
 RUN apt-get update && \
-    apt-get install -y --no-install-recommends curl ca-certificates \
-      git pkg-config zip unzip \
-      g++ gcc openjdk-8-jdk \
-      zlib1g-dev libarchive-dev \
-      ca-certificates-java && \
+    apt-get install -y --no-install-recommends \
+      curl ca-certificates ca-certificates-java \
+      git pkg-config \
+      zip unzip zlib1g-dev libarchive-dev \
+      g++ gcc openjdk-8-jdk python && \
     apt-get clean

src/test/docker/Dockerfile.ubuntu-16.04

@@ -1,8 +1,8 @@
 FROM ubuntu:16.04
 RUN apt-get update && \
-    apt-get install -y --no-install-recommends curl ca-certificates \
-      git pkg-config zip unzip \
-      g++ gcc openjdk-8-jdk \
-      zlib1g-dev libarchive-dev \
-      ca-certificates-java && \
+    apt-get install -y --no-install-recommends \
+      curl ca-certificates ca-certificates-java \
+      git pkg-config \
+      zip unzip zlib1g-dev libarchive-dev \
+      g++ gcc openjdk-8-jdk python && \
     apt-get clean