Limit the max paramiko version to <2.0.1

Paramiko 2.0.1+ requires updated 'cryptography' that don't work
with the python-openssl 0.15.1

Change-Id: Ib34ecee2db2a91c52000863d6a3d5d31155c97b2
diff --git a/requirements.txt b/requirements.txt
index 18aad90..6345082 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-paramiko>=1.16.0,!=2.0.1
+paramiko>=1.16.0,<2.0.1
 PyYAML>=3.1.0
 six>=1.9.0
 cookiecutter