HTCONDOR-1213 Invoke syscall disconnect code when JobExit RPC fails
HTCONDOR-1213 Invoke syscall disconnect code when JobExit RPC fails

When the JobExit RPC fails, call the syscall disconnect code
explicitly. The socket has been unregistered from DaemonCore at this
point, so there will be no subsequent notification of the socket being
dead. Otherwise, the starter will wait forever for a reconnect from
the shadow.

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor