Replace deprecated "sudo" with "become"

tasks/main.yml

 ---
 - name: install prerequisites
-  sudo: yes
+  become: yes
   apt:
     name: "{{ item}}"
     state: present
@@ -25,7 +25,7 @@
     - nginx
 
 - name: create git user
-  sudo: yes
+  become: yes
   user:
     name: git
     comment: "GitLab"
@@ -33,7 +33,7 @@
     state: present
 
 - name: configure git
-  sudo: yes
+  become: yes
   copy:
     src: gitconfig
     dest: /home/git/.gitconfig
@@ -42,7 +42,7 @@
     mode: 0664
 
 - name: create database user
-  sudo: yes
+  become: yes
   sudo_user: postgres
   postgresql_user:
     name: git
@@ -50,7 +50,7 @@
     state: present
 
 - name: create database table
-  sudo: yes
+  become: yes
   sudo_user: postgres
   postgresql_db:
     name: gitlabhq_production
@@ -58,7 +58,7 @@
     state: present
 
 - name: clone gitlab source
-  sudo: yes
+  become: yes
   sudo_user: git
   git:
     repo: https://gitlab.com/gitlab-org/gitlab-ce.git
@@ -96,7 +96,7 @@
     - { key: "email_reply_to" , value: "{{ gitlab_config_email_reply_to }}" }
 
 - name: setup folder permissions
-  sudo: yes
+  become: yes
   file:
     path: "{{ item }}"
     state: directory
@@ -110,25 +110,25 @@
     - /home/git/gitlab-satellites
 
 - name: reduce permissions for log directory
-  sudo: yes
+  become: yes
   file:
     path: /home/git/gitlab/log
     mode: go-w
 
 - name: reduce permissions for database config
-  sudo: yes
+  become: yes
   file:
     path: /home/git/gitlab/config/database.yml
     mode: o-rwx
 
 - name: reduce permissions for gitlab-satellites directory
-  sudo: yes
+  become: yes
   file:
     path: /home/git/gitlab-satellites
     mode: g=rx,o-rwx
 
 - name: install gems
-  sudo: yes
+  become: yes
   sudo_user: git
   command: bundle install -j8 --deployment --without development test mysql aws kerberos
   args:
@@ -136,7 +136,7 @@
   when: result | changed
 
 - name: install gitlab shell
-  sudo: yes
+  become: yes
   sudo_user: git
   command: bundle exec rake gitlab:shell:install[v2.6.3] REDIS_URL=unix:/var/run/redis/redis.sock RAILS_ENV=production
   args:
@@ -144,7 +144,7 @@
   when: result | changed
 
 - name: initialize database
-  sudo: yes
+  become: yes
   sudo_user: git
   command: echo yes | bundle exec rake gitlab:setup RAILS_ENV=production
   args:
@@ -162,13 +162,13 @@
     enabled: yes
 
 - name: setup logrotate
-  sudo: yes
+  become: yes
   command: cp /home/git/gitlab/lib/support/logrotate/gitlab /etc/logrotate.d/gitlab
   args:
     creates: /etc/logrotate.d/gitlab
 
 - name: compile assets
-  sudo: yes
+  become: yes
   sudo_user: git
   command: bundle exec rake assets:precompile RAILS_ENV=production
   args:
@@ -176,25 +176,25 @@
   when: result | changed
 
 - name: start gitlab instance
-  sudo: yes
+  become: yes
   service:
     name: gitlab
     state: running
 
 - name: copy nginx configuration from gitlab
-  sudo: yes
+  become: yes
   command: cp /home/git/gitlab/lib/support/nginx/gitlab /etc/nginx/sites-available/gitlab
   args:
     creates: /etc/nginx/sites-available/gitlab
 
 - name: activate nginx gitlab site
-  sudo: yes
+  become: yes
   command: ln -s /etc/nginx/sites-available/gitlab /etc/nginx/sites-enabled/gitlab
   args:
     creates: /etc/nginx/sites-enabled/gitlab
 
 - name: deactivate nginx default site
-  sudo: yes
+  become: yes
   command: rm -f /etc/nginx/sites-enabled/default
 
 - name: set FQND in gitlab config
@@ -204,7 +204,7 @@
     replace: "{{ gitlab_config_host }}"
 
 - name: restart nginx
-  sudo: yes
+  become: yes
   service:
     name: nginx
     state: restarted