Required changes for the voltha base image to get it to work

Change-Id: I582665904da499dcbfbcd95ca7fb8d77053b8478
diff --git a/ansible/scripts/bootstrap_ansible.sh b/ansible/scripts/bootstrap_ansible.sh
index 7602afa..183ac4a 100755
--- a/ansible/scripts/bootstrap_ansible.sh
+++ b/ansible/scripts/bootstrap_ansible.sh
@@ -18,6 +18,7 @@
 set -e
 
 echo "Installing Ansible..."
+rm /var/lib/dpkg/lock
 apt-get install -y software-properties-common
 apt-add-repository ppa:ansible/ansible
 apt-get update