Change all -> localhost for boto3

Change-Id: I619a95a3f410637f27fa7aa0f51d065b539b5353
diff --git a/playbooks/base/pre-logs.yaml b/playbooks/base/pre-logs.yaml
index 5382501..e6209a7 100644
--- a/playbooks/base/pre-logs.yaml
+++ b/playbooks/base/pre-logs.yaml
@@ -1,4 +1,4 @@
-- hosts: all
+- hosts: localhost
   roles:
     - ensure-pip
   tasks: