refactor pagelock module to routing

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| Refs tickets  | #1788
| License       | MIT
| Doc PR        | -

refs #1788
Probably better to use `$request->getClientIp()`
-- http://api.symfony.com/2.0/Symfony/Component/HttpFoundation/Request.html#method_getClientIp