message: CI: Install drake requirements.
diff: @@ -13,6 +13,7 @@ x86_64-centos6-gcc4:
  - git submodule sync
  - git submodule update --init --recursive --force
  - git fetch origin --tags
  + - pip3 install -r drake/requirements.txt
  - SOURCE_DIR="${CI_PROJECT_DIR}"
  - BUILD_DIR="$(dirname ${CI_PROJECT_DIR})/${CI_PROJECT_NAME}-build"
  - INSTALL_DIR="${SOURCE_DIR}/_install"
  @@ -44,6 +45,7 @@ x86_64-ubuntu-gcc4:
  - git submodule sync --recursive
  - git submodule update --init --recursive --force
  - git fetch origin --tags
  + - pip3 install -r drake/requirements.txt
  - SOURCE_DIR="${CI_PROJECT_DIR}"
  - BUILD_DIR="$(dirname ${CI_PROJECT_DIR})/${CI_PROJECT_NAME}-build"
  - INSTALL_DIR="${SOURCE_DIR}/_install"
  @@ -76,6 +78,7 @@ x86_64-jessie-gcc4:
  - git submodule sync --recursive
  - git submodule update --init --recursive --force
  - git fetch origin --tags
  + - pip3 install -r drake/requirements.txt
  - SOURCE_DIR="${CI_PROJECT_DIR}"
  - BUILD_DIR="$(dirname ${CI_PROJECT_DIR})/${CI_PROJECT_NAME}-build"
  - INSTALL_DIR="${SOURCE_DIR}/_install"
  @@ -107,6 +110,7 @@ x86_64-alpine-gcc:
  - git submodule sync --recursive
  - git submodule update --init --recursive --force
  - git fetch origin --tags
  + - pip3 install -r drake/requirements.txt
  - SOURCE_DIR="${CI_PROJECT_DIR}"
  - BUILD_DIR="$(dirname ${CI_PROJECT_DIR})/${CI_PROJECT_NAME}-build"
  - INSTALL_DIR="${SOURCE_DIR}/_install"
  @@ -139,6 +143,7 @@ i386-jessie-gcc4:
  - git submodule sync --recursive
  - git submodule update --init --recursive --force
  - git fetch origin --tags
  + - pip3 install -r drake/requirements.txt
  - SOURCE_DIR="${CI_PROJECT_DIR}"
  - BUILD_DIR="$(dirname ${CI_PROJECT_DIR})/${CI_PROJECT_NAME}-build"
  - INSTALL_DIR="${SOURCE_DIR}/_install"
  @@ -170,6 +175,7 @@ x86_64-windows-mingw4:
  - git submodule sync --recursive
  - git submodule update --init --recursive --force
  - git fetch origin --tags
  + - pip3 install -r drake/requirements.txt
  - SOURCE_DIR="${CI_PROJECT_DIR}"
  - BUILD_DIR="$(dirname ${CI_PROJECT_DIR})/${CI_PROJECT_NAME}-build"
  - INSTALL_DIR="${SOURCE_DIR}/_install"
  