Enabled Owin wrapper to capture all headers as attributes

[vuqtran88]

Feature Description

Enabled Owin wrapper to capture all headers as attributes if the allow_all_headers setting is set to true.

Acceptance Criteria:
Captures all headers as attributes if allow_all_headers enabled.
Automatically captures the following request headers regardless the condition of the allow_all_headers:

request.headers.referer
Request.headers.accept
     request.headers.contentLength
     request.headers.host
     request.headers.userAgent

Adds integration tests. Integration tests should to test attribute inclusion/exclusion.

Test high security mode.