Add Rest client that do not add any default headers

Add Rest client that do not add any default headers

In consequence we can specify client without default
headers. Still, we can specify additional headers in
the client properties. We can use data disctionary
definition to add extra headers. Sice Kohn we can also
template the headers section in the data dictionary so
ssuch headers can be created dynamically.

Issue-ID: CCSDK-3787
Signed-off-by: Lukasz Rajewski <lukasz.rajewski@t-mobile.pl>
Change-Id: I14c219251e11733c7cdfe059c87717f6b0fded0d