Fix logging problem for ansible-playbook

Ansible could not write to the log because the ansible is run inside
a chroot env. and on read-only fs - this is solved by adding new rw mount.

Change-Id: I874063ad99948a55f9227d5e7eae05d3eaabe535
Issue-ID: OOM-1575
Signed-off-by: Petr Ospalý <p.ospaly@partner.samsung.com>
diff --git a/ansible/ansible.cfg b/ansible/ansible.cfg
index c2ee3ff..0978b81 100644
--- a/ansible/ansible.cfg
+++ b/ansible/ansible.cfg
@@ -6,3 +6,4 @@
 # relative path ./application is mapped into ansible container under
 # /ansible/application where application roles should be found
 roles_path = /ansible/application
+log_path = /ansible/log/ansible.log