Ubuntu Trusty gets postgresql-9.3.

Resolves #363.

roles/mailserver/tasks/dovecot.yml

-- name: Install Dovecot and related packages
+- name: Install Dovecot and related packages for distributions other than Ubuntu Trusty
   apt: pkg={{ item }} state=installed
   with_items:
     - dovecot-core
     - dovecot-managesieved
     - dovecot-pgsql
     - dovecot-pop3d
-    - postgresql-9.1
+    - postgresql-9.3
   when: ansible_distribution_release == 'trusty'
 
 - name: Create vmail group

roles/mailserver/tasks/postfix.yml

-- name: Install Postfix 9.1 and related packages
+- name: Install Postfix 9.1 and related packages for distributions other than Ubuntu Trusty
   apt: pkg={{ item }} state=installed
   with_items:
     - libsasl2-modules
     - sasl2-bin
   when: ansible_distribution_release != 'trusty'
 
-- name: Install Postfix 9.1 and related packages for Ubuntu Trusty
+- name: Install Postfix 9.3 and related packages for Ubuntu Trusty
   apt: pkg={{ item }} state=installed
   with_items:
     - libsasl2-modules
     - postfix
     - postfix-pcre
     - postfix-pgsql
-    - postgresql-9.1
+    - postgresql-9.3
     - postgrey
     - python-psycopg2
     - sasl2-bin

roles/owncloud/tasks/owncloud.yml

 ---
 # Installs the ownCloud personal cloud software
 # as per http://www.debiantutorials.com/how-to-install-owncloud-on-wheezy/
-- name: Install dependencies
+
+- name: Install Postgres 9.1 on distributions other than Ubuntu Trusty
+  apt: pkg=postgresql-9.1 state=present
+  when: ansible_distribution_release != 'trusty'
+
+- name: Install Postgres 9.3 on Ubuntu Trusty
+  apt: pkg=postgresql-9.3 state=present
+  when: ansible_distribution_release == 'trusty'
+
+- name: Install ownCloud dependencies
   apt: pkg={{ item }} state=present
   with_items:
     - libapache2-mod-php5
     - php-apc
     - python-psycopg2
-    - postgresql-9.1
 
 - name: Set postgres password
   command: sudo -u {{ db_admin_username }} psql -d {{ db_admin_username }} -c "ALTER USER postgres with  password '{{ db_admin_password }}';"