check route-href attribute

[atsu85]

Given template with

...
<a route-href="route: client; params.bind: { id: client.id }">go...</a>
...

should check:

• [ ] that route-href attribute contains route argument
• [ ] if it contains some other argument in addition to route, it should be params
• [ ] check param values (presence of client and that it has id property)