Filters are not working when I generate it for Angular 4

[udayaramu]

What type of issue are you creating?

• [ x] Bug
• [ ] Enhancement
• [ ] Question

What version of this module are you using?

• [ ] 2.0.10 (Stable)
• [ ] 2.1.0-rc.n (2.1 Release Candidate n)
• [ x] Other

Write other if any: 2.2.0

Please add a description for your issue:

When the base.service.ts is generated for Angular TS .. Its not concatenating the queryString (filter where cause which was generated). Due to this, when we pass LoopBackFilter in Find methods, its not filtering.. It need to be fixed in next release.

[Eslem]

It's a bug related to the headers, check #571 to fix it