add a new ippidb system user

Former-commit-id: 13b49caddee78b2d74d9a492b49ef474a98e686c

ansible/system.yaml

@@ -2,9 +2,9 @@
 - hosts: all
   gather_facts: no
   tasks:
-    - name: Create ubuntu user
-      user: name=ubuntu generate_ssh_key=yes ssh_key_bits=2048 ssh_key_file=.ssh/id_rsa
+    - name: Create ippidb user
+      user: name=ippidb generate_ssh_key=yes ssh_key_bits=2048 ssh_key_file=.ssh/id_rsa
     - name: Read SSH public key
-      slurp: src=/home/ubuntu/.ssh/id_rsa.pub
+      slurp: src=/home/ippidb/.ssh/id_rsa.pub
       register: public_key
     - debug: msg="{{ public_key['content'] | b64decode }}"