[autotest] Update the paramiko download link

Paramiko is an external package need to be downloaded. Previous download
link is obsolete. Update the download link.

BUG=None
TEST=Test on test instance.

Change-Id: I6875ee48309a303b4e0af998b86e6b01b89022c9
Reviewed-on: https://chromium-review.googlesource.com/324145
Commit-Ready: Shuqian Zhao <shuqianz@chromium.org>
Tested-by: Shuqian Zhao <shuqianz@chromium.org>
Reviewed-by: Dan Shi <dshi@google.com>
diff --git a/utils/external_packages.py b/utils/external_packages.py
index bc4ee1e..2017eee 100644
--- a/utils/external_packages.py
+++ b/utils/external_packages.py
@@ -676,10 +676,9 @@
 class ParamikoPackage(ExternalPackage):
     """paramiko package"""
     version = '1.7.5'
-    local_filename = 'paramiko-%s.tar.gz' % version
-    urls = ('http://www.lag.net/paramiko/download/' + local_filename,
-            'ftp://mirrors.kernel.org/gentoo/distfiles/' + local_filename,)
-    hex_sum = '592be7a08290070b71da63a8e6f28a803399e5c5'
+    local_filename = 'paramiko-%s.zip' % version
+    urls = ('https://pypi.python.org/packages/source/p/paramiko/' + local_filename,)
+    hex_sum = 'd23e437c0d8bd6aeb181d9990a9d670fb30d0c72'
 
 
     _build_and_install = ExternalPackage._build_and_install_from_package