Update platforms to test on

Signed-off-by: Tim Smith <tsmith@chef.io>

.kitchen.yml

@@ -8,10 +8,9 @@ verifier:
   name: inspec
 
 platforms:
-  - name: centos-7.2
+  - name: centos-7.3
   - name: debian-7.11
   - name: debian-8.6
-  - name: ubuntu-12.04
   - name: ubuntu-14.04
   - name: ubuntu-16.04
   - name: ubuntu-16.04-chef-12.1

.travis.yml

@@ -25,24 +25,19 @@ env:
   - INSTANCE=default-debian-8
   - INSTANCE=default-ubuntu-1604
   - INSTANCE=default-ubuntu-1404
-  - INSTANCE=default-ubuntu-1204
   # - INSTANCE=cacher-debian-7 #ipv6 failures
   - INSTANCE=cacher-debian-8
   - INSTANCE=cacher-ubuntu-1604
   - INSTANCE=cacher-ubuntu-1404
-  - INSTANCE=cacher-ubuntu-1204
   - INSTANCE=compile-time-ubuntu-1604
   - INSTANCE=compile-time-ubuntu-1404
-  - INSTANCE=compile-time-ubuntu-1204
   - INSTANCE=compile-time-debian-7
   - INSTANCE=compile-time-debian-8
   - INSTANCE=resources-ubuntu-1604
   - INSTANCE=resources-ubuntu-1404
-  - INSTANCE=resources-ubuntu-1204
   - INSTANCE=resources-debian-7
   - INSTANCE=resources-debian-8
   - INSTANCE=unattended-upgrades-ubuntu-1404
-  - INSTANCE=unattended-upgrades-ubuntu-1204
 
 before_script:
   - sudo iptables -L DOCKER || ( echo "DOCKER iptables chain missing" ; sudo iptables -N DOCKER )