Change sudo to become in bootstrap playbooks

As we are using ansible 2.0, we should move from sudo to become to
avoid deprecation.

Change-Id: I7a99df005dcdcd12e9a2afdeb0c908fe2069cc57
Related-bug: 1547430

bootstrap/build-image.yaml

@@ -1,7 +1,7 @@
 ---
 
 - hosts: all
-  sudo: yes
+  become: yes
   tasks:
      #- shell: vagrant init ubuntu/trusty64
     - shell: /usr/local/bin/packer build -only=qemu solar-master.json -var 'is_master=true'

bootstrap/packer.yaml

@@ -1,7 +1,7 @@
 ---
 
 - hosts: all
-  sudo: yes
+  become: yes
   tasks:
     - shell: wget 'https://dl.bintray.com/mitchellh/packer/packer_0.8.2_linux_amd64.zip' -O /tmp/packer-0.8.2.zip
       args:

bootstrap/playbooks/build-main.yaml

@@ -2,7 +2,7 @@
 
 - name: Main build script
   hosts: all
-  sudo: yes
+  become: yes
   vars:
     ssh_ip_mask: "10.*.*.*"
   tasks:

bootstrap/playbooks/pxe.yaml

@@ -2,7 +2,7 @@
 
 - name: Setup dhcp server with bootstrap image
   hosts: all
-  sudo: yes
+  become: yes
   vars:
     tftp_root: /var/lib/tftp
     dhcp_range_start: 10.0.0.42

bootstrap/playbooks/solar-agent.yaml

@@ -1,7 +1,7 @@
 ---
 
 - hosts: all
-  sudo: yes
+  become: yes
   vars:
     ssh_ip_mask: "10.*.*.*"
   tasks:

bootstrap/playbooks/solar.yaml

@@ -1,7 +1,7 @@
 ---
 
 - hosts: localhost
-  sudo: yes
+  become: yes
   vars:
     ssh_ip_mask: "10.*.*.*"
   tasks: