Update CI install phase to install PostgreSQL 9.2

The CI build image is now shipped with PostgreSQL 9.2 pre-installed.
Updated the install phase to match this.

.travis.yml

@@ -28,7 +28,7 @@ install:
     - sed -e 's/username = guest/username = unittest/' -e 's/password = guest/password = gottatest/' nipap-cli/nipaprc > ~/.nipaprc
     - chmod 0600 ~/.nipaprc
     # install postgresql + ip4r + contrib
-    - sudo apt-get install -qq -y postgresql-9.1 postgresql-9.1-ip4r postgresql-contrib-9.1
+    - sudo apt-get install -qq -y postgresql-9.2 postgresql-9.2-ip4r postgresql-contrib-9.2
 
     # -- virtualenv build ------------------------------------------------------
     # install nipap dependencies
@@ -54,7 +54,7 @@ install:
     - if [ "$INSTALL" == "apt" ]; then wget -O - https://spritelink.github.io/NIPAP/nipap.gpg.key | sudo apt-key add -; fi
     - if [ "$INSTALL" == "apt" ]; then sudo apt-get update -qq; fi
     # install dependencies for installing & running nipap
-    - if [ "$INSTALL" == "apt" ]; then sudo apt-get install -qq -y --force-yes python-pysqlite2 python-psycopg2 python-ipy python3-ipy python-docutils postgresql-9.1 postgresql-9.1-ip4r python-tornado python-flask python-flask-xml-rpc python-flask-compress python-parsedatetime python-pylons python-tz python-dateutil python-psutil python-pyparsing; fi
+    - if [ "$INSTALL" == "apt" ]; then sudo apt-get install -qq -y --force-yes python-pysqlite2 python-psycopg2 python-ipy python3-ipy python-docutils postgresql-9.2 postgresql-9.2-ip4r python-tornado python-flask python-flask-xml-rpc python-flask-compress python-parsedatetime python-pylons python-tz python-dateutil python-psutil python-pyparsing; fi
     # if we are testing the upgrade, first install NIPAP packages from official repo
     - if [ "$INSTALL" == "apt" ] && [ "$UPGRADE" == "true" ]; then sudo apt-get install -qq nipapd nipap-www nipap-cli; fi
     # bump version so that we know we are upgrading beyond what is installed