change apn

[Issue 5947494] South Africa MTN APN Information Change
MTN wants only 1 APN, and so the MTN APN information needs to be
integrated as one

[Issue 5963659]
Result:
There is no APN information for Cheers

Expected Result:
Mobile internet APN name for Cheers should be displayed

[Issue 6054755] [Prime-Canada] MTS APN Registration Request

[Issue6105432 [Prime-Canada] Eastlink APN Registration Request

Change-Id: I8a3cba1d041765a7270b8dd9eefff71d41cea9d1
Signed-off-by: Sangcheol Lee <goodsc.lee@samsung.com>
bug:5947494
bug:5963659
bug:6054755
bug:6105432