rename ubuntu12->ubuntu1204

Author: rvagg

ansible/inventory.yml

@@ -90,8 +90,8 @@ hosts:
         freebsd10-x64-1: {ip: 159.203.59.134, user: freebsd}
         freebsd11-x64-1: {ip: 45.55.90.237, user: freebsd}
         freebsd11-x64-2: {ip: 107.170.28.213, user: freebsd}
-        ubuntu12-x64-1: {ip: 104.236.234.182}
-        ubuntu12-x64-2: {ip: 107.170.104.83}
+        ubuntu1204-x64-1: {ip: 104.236.234.182}
+        ubuntu1204-x64-2: {ip: 107.170.104.83}
         ubuntu1404-x64-1: {ip: 45.55.252.223}
         ubuntu1404-x86-1: {ip: 159.203.115.220}
         ubuntu1604-x86-1: {ip: 159.203.77.233}