Dialogic board: no info when a likset is down

[vetss]

In cases:

• when on of linksets at the board is down
• and we are starting JSS7 stack after the dialogic board has already started

then the board does not inform JSS7 stack of this (it usually does it by MTP-PAUSE message). Then JSS7 stack (in SCCP loadsharing process for example) sends message to both linksets (working and down) and 50% of traffic fails. The workaround is - to restart the dialogic board. In this case we will get information. We need to think of how can we obtain the info from the board into JSS7 stack.

[vetss]

A needed solution is described in https://github.com/RestComm/jss7/issues/64