Admin: Allow searching users with their full name

[jampukka]

Allow Admin to find users when searching with their whole name.

oskaridb=# select user_name, first_name, last_name from oskari_users;
 user_name  | first_name | last_name
------------+------------+-----------
 user       | Oskari     | Demo user
 testirobot | Test       | Robot
 admin      | Oskari     | Admin
(3 rows)

Searching with search=Oskari Admin:

oskaridb=# SELECT first_name, last_name, user_name
FROM oskari_users
WHERE
  user_name ilike '%' || 'Oskari Admin' || '%'
  OR first_name ilike '%' || 'Oskari Admin' || '%'
  OR last_name ilike '%' || 'Oskari Admin' || '%'
  OR email ilike '%' || 'Oskari Admin' || '%';
 first_name | last_name | user_name
------------+-----------+-----------
(0 rows)

With the code change:

oskaridb=# SELECT first_name, last_name, user_name
FROM oskari_users
WHERE
  user_name ilike '%' || 'Oskari Admin' || '%'
  OR first_name ilike '%' || 'Oskari Admin' || '%'
  OR last_name ilike '%' || 'Oskari Admin' || '%'
  OR email ilike '%' || 'Oskari Admin' || '%'
  OR replace(first_name || last_name, ' ', '') ilike '%' || replace('Oskari Admin', ' ', '') || '%'
  OR replace(last_name || first_name, ' ', '') ilike '%' || replace('Oskari Admin', ' ', '') || '%';
 first_name | last_name | user_name
------------+-----------+-----------
 Oskari     | Admin     | admin

The second OR handles searching with {lastName} {firstName} order, not uncommon to do with actual human names.