[PATCH 1 of 3 STABLE] contrib: install Python 2.7.17 and 3.7.5 in Windows environment

[Gregory Szorc]

# HG changeset patch
# User Gregory Szorc <gregory.szorc at gmail.com>
# Date 1571711106 25200
#      Mon Oct 21 19:25:06 2019 -0700
# Branch stable
# Node ID 4646f3df342969d29fca59c594b010d88493936b
# Parent  b4b1131187c4801ba4e2c6d4eafbb51d024edf2e
contrib: install Python 2.7.17 and 3.7.5 in Windows environment

These are the latest Python versions and we should use them.

diff --git a/contrib/install-windows-dependencies.ps1 b/contrib/install-windows-dependencies.ps1
--- a/contrib/install-windows-dependencies.ps1
+++ b/contrib/install-windows-dependencies.ps1
@@ -22,10 +22,10 @@
 $VC9_PYTHON_URL = "https://download.microsoft.com/download/7/9/6/796EF2E4-801B-4FC4-AB28-B59FBF6D907B/VCForPython27.msi"
 $VC9_PYTHON_SHA256 = "070474db76a2e625513a5835df4595df9324d820f9cc97eab2a596dcbc2f5cbf"
 
-$PYTHON27_x64_URL = "https://www.python.org/ftp/python/2.7.16/python-2.7.16.amd64.msi"
-$PYTHON27_x64_SHA256 = "7c0f45993019152d46041a7db4b947b919558fdb7a8f67bcd0535bc98d42b603"
-$PYTHON27_X86_URL = "https://www.python.org/ftp/python/2.7.16/python-2.7.16.msi"
-$PYTHON27_X86_SHA256 = "d57dc3e1ba490aee856c28b4915d09e3f49442461e46e481bc6b2d18207831d7"
+$PYTHON27_x64_URL = "https://www.python.org/ftp/python/2.7.17/python-2.7.17.amd64.msi"
+$PYTHON27_x64_SHA256 = "3b934447e3620e51d2daf5b2f258c9b617bcc686ca2f777a49aa3b47893abf1b"
+$PYTHON27_X86_URL = "https://www.python.org/ftp/python/2.7.17/python-2.7.17.msi"
+$PYTHON27_X86_SHA256 = "a4e3a321517c6b0c2693d6f712a0d18c82600b3d0c759c299b3d14384a17f863"
 
 $PYTHON35_x86_URL = "https://www.python.org/ftp/python/3.5.4/python-3.5.4.exe"
 $PYTHON35_x86_SHA256 = "F27C2D67FD9688E4970F3BFF799BB9D722A0D6C2C13B04848E1F7D620B524B0E"
@@ -37,10 +37,10 @@
 $PYTHON36_x64_URL = "https://www.python.org/ftp/python/3.6.8/python-3.6.8-amd64.exe"
 $PYTHON36_x64_SHA256 = "96088A58B7C43BC83B84E6B67F15E8706C614023DD64F9A5A14E81FF824ADADC"
 
-$PYTHON37_x86_URL = "https://www.python.org/ftp/python/3.7.4/python-3.7.4.exe"
-$PYTHON37_x86_SHA256 = "9a30ab5568ba37bfbcae5cdee19e9dc30765c42cf066f605221563ff8b20ee34"
-$PYTHON37_X64_URL = "https://www.python.org/ftp/python/3.7.4/python-3.7.4-amd64.exe"
-$PYTHON37_x64_SHA256 = "bab92f987320975c7826171a072bfd64f8f0941aaf2cdeba6924b7025c9968a3"
+$PYTHON37_x86_URL = "https://www.python.org/ftp/python/3.7.5/python-3.7.5.exe"
+$PYTHON37_x86_SHA256 = "3c2ae8f72b48e6e0c2b482206e322bf5d0344ff91abc3b3c200cec9e275c7168"
+$PYTHON37_X64_URL = "https://www.python.org/ftp/python/3.7.5/python-3.7.5-amd64.exe"
+$PYTHON37_x64_SHA256 = "f3d60c127e7a92ed547efa3321bf70cd96b75c53bf4b903147015257c1314981"
 
 $PYTHON38_x86_URL = "https://www.python.org/ftp/python/3.8.0/python-3.8.0.exe"
 $PYTHON38_x86_SHA256 = "b471908de5e10d8fb5c3351a5affb1172da7790c533e0c9ffbaeec9c11611b15"