Osmocom_VTY_Functions: Generalize to handle multiple VTY ports

The existing Osmocom_VTY_Functions code was centered around a global
module parameter specifying the prompt prefix.  This prevented a
single test to use multiple VTY connections to different Osmocom
programs.

This patch generalize the code by widening the prompt matching
in f_vty_wait_for_prompt() and by allowing the caller to specify
the prompt prefix to override the modulepar.

Change-Id: I574b56c42fe95540af44a2c43d0fb469938c0e65
1 file changed