Adds TimeoutError handling to the retryer wrapper function. This will ensure that gRPC calls succed while upgrading a Helm based EE.

Change-Id: I49a0ec370986e45e8b779f361ee4d72ff5a15ef1
Signed-off-by: Gabriel Cuba <gcuba@whitestack.com>
diff --git a/osm_lcm/lcm_helm_conn.py b/osm_lcm/lcm_helm_conn.py
index 4d1bfb2..d1ad4c5 100644
--- a/osm_lcm/lcm_helm_conn.py
+++ b/osm_lcm/lcm_helm_conn.py
@@ -47,7 +47,7 @@
 
 def retryer(max_wait_time_var="_initial_retry_time", delay_time_var="_retry_delay"):
     def wrapper(func):
-        retry_exceptions = ConnectionRefusedError
+        retry_exceptions = (ConnectionRefusedError, TimeoutError)
 
         @functools.wraps(func)
         async def wrapped(*args, **kwargs):