Fix: Fixed version of tinyrpc to not break the Ryu installation.

Change-Id: I901da179c43bdce4337575691fab82baae7987f4
Signed-off-by: peusterm <manuel.peuster@uni-paderborn.de>
diff --git a/ansible/install.yml b/ansible/install.yml
index 4cf9be7..e303aad 100755
--- a/ansible/install.yml
+++ b/ansible/install.yml
@@ -56,6 +56,9 @@
    - name: install six
      pip: name=six state=latest
 
+   - name: install tinyrpc (fixed version to not break ryu)
+     pip: name=tinyrpc version=1.0.3
+
    - name: install ryu
      pip: name=ryu state=latest