message: temporarily pin windows variants to server version 4.2
diff: @@ -716,7 +716,7 @@ buildvariants:
  tar_options: *linux_tar_options
  extra_path: *msvc2015_extra_path
  cmake_flags: *msvc2015_cmake_flags
  - mongodb_version: *version_latest
  + mongodb_version: *version_42
  run_on:
  - windows-64-vs2015-compile
  tasks:
  @@ -731,7 +731,7 @@ buildvariants:
  tar_options: *linux_tar_options
  extra_path: *msvc2015_extra_path
  cmake_flags: *msvc2015_cmake_flags
  - mongodb_version: *version_latest
  + mongodb_version: *version_42
  run_on:
  - windows-64-vs2015-compile
  tasks:
  