CORD-706: BUG: Interpret unreachable nodes as failures

Change-Id: I047366b03f2dd627963dd684bfde61a82ef3b4f4
diff --git a/xos/synchronizers/base/ansible_helper.py b/xos/synchronizers/base/ansible_helper.py
index 9061fd9..d39e45a 100644
--- a/xos/synchronizers/base/ansible_helper.py
+++ b/xos/synchronizers/base/ansible_helper.py
@@ -82,6 +82,7 @@
             if not x.is_failed() and not x.is_unreachable() and not x.is_skipped():
                 ok_results.append(x)
             elif x.is_unreachable():
+                failed+=1
                 total_unreachable+=1
                 try:
                     error_msg.append(x._result['msg'])