upf/PFCP: do not imply f_inet_addr()

PFCP_Templates.ttcn is not the place to do the conversion between string
and OCT4.

When I wanted to use an OCT4 address in some ts_PFCP_* template, it
dawned on me that it is stupid to convert the OCT4 to a string, just so
that the ts_PFCP_* template converts it back to OCT4.

Related: SYS#6192 SYS#5599
Change-Id: Ib068831787f4256f70a2189a5f36ca1ea1f40c9e
3 files changed