Set X-CS for all carriers identified by netmapper by default

* Any new carrier is whitelisted for all languages for both m & zero,
so we can just use the value returned from netmapper for X-CS header.
* Removed any specific carriers that are whitelisted in all cases.

Change-Id: I176b6c188cdd9e5f99cd37c0bd8eff8636bce6b7