* add described query_params 'subscriber_id', 'reseller_id' so they are
avaialable on the doc
* remove search by param from Role::ResellerBrandingLogos::_item_rs()
* fix Role::ResellerBrandingLogos::_item_rs() queries
* Controller::API::ResellerBrandingLogos*
- now always returns the binary data containing the logo and with
the Content-Type header
- change NOT_FOUND message to indicate that the ResellerBrandingLogo
is either not found or does not have image/image_type
* do not log response queries
* fix allowed_role to be: admin, reseller, subsscriberadmin
Change-Id: Iaadb47fb2d72886a8d9244a523d5914500a4dd20