Processing incorrect filter causes to infinity loop

[boris-meerovich-sp]

Hi,
Looks like our QA team found a bug when sending incorrect filter like
"v2/users/?filter=username eq fff@cc.com"
The value quotes are missing and there is a dot(.) into it.

How to reproduce:
Just change row in ExecuteUser method in example console log to the following:
//var json = await client.GetStringAsync("v2/users/" + user.Id);
var json = await client.GetStringAsync("v2/users/?filter=username eq fff@cc.com");

Af far as I debug it, the problem is in Owin.Scim-master\source\Owin.Scim\Querying\ScimFilter.cs in ProcessFilter() method. The loop became infinity loop when parsing the incorrect value.