updated use of threads

configuration/opdk-set-reachable.yml

diff --git a/configuration/opdk-set-reachable.yml b/configuration/opdk-set-reachable.yml
index 4cedf06..26fccdb 100644
--- a/configuration/opdk-set-reachable.yml
+++ b/configuration/opdk-set-reachable.yml
@@ -1,6 +1,6 @@
 ---
 - hosts: '{{ hosts }}'
-  strategy: free
+  serial: 1
   vars_files:
   - ~/.apigee/credentials.yml
   roles:

configuration/update_cache.yml

diff --git a/configuration/update_cache.yml b/configuration/update_cache.yml
index 754e9e4..286fafb 100644
--- a/configuration/update_cache.yml
+++ b/configuration/update_cache.yml
@@ -1,5 +1,6 @@
 ---
 - hosts: planet
+  strategy: free
   vars_files:
   - ~/.apigee/credentials.yml
   pre_tasks: