Permit any Sender MSISDN when sending SMS from VTY

In the old days, OsmoNITB couldn't process any SMS that wasn't between
two subscribers on the same NITB.

We've long re-worked the internals in order to process SMS with
arbitrary sender MSISDN (e.g. from SMPP). However, the VTY command
"subscriber ... sms" was never updated, it seems.

Change-Id: I62b17e0a67989484415f0df2c8cb4ff1f94dbf2b
Closes: OS#3151
4 files changed