Revert "[tests] Appveyor tests with different image"

This reverts commit a04f092f72c77f063e130748ec114c2f5d6245f5.

Reason for revert: SSL error

Change-Id: I1d4e1bd05bd11913be8b85eecbc343609442ae52
---
M .appveyor.yml
1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/.appveyor.yml b/.appveyor.yml
index c1e9315..f374f7f 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -16,9 +16,8 @@
 
     # Test the lowest supported release of each major Python version
 
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
-      PYTHON: "C:\\Python36-x64"
-      PYTHON_VERSION: "3.6.x"
+    - PYTHON: "C:\\Python361-x64"
+      PYTHON_VERSION: "3.6.1"
       PYTHON_ARCH: "64"
 
     # AppVeyor pre-installs these versions onto build machines
@@ -58,6 +57,8 @@
   - git submodule update --init
   # Download the AppVeyor Python build accessories into subdirectory .\appveyor
   - mkdir appveyor
+  # Download Python 3.6.1 which isn't pre-installed
+  - ps: ./appveyor_install.ps1
   - python --version
   - python -c "import platform; print(platform.machine())"
   - python -c "import struct; print('PYTHON_ARCH:', struct.calcsize('P') << 3)"

