1.DCS child server state remains as CONNECT_REJECT

DCS server STATE is listed as CONNECT_REJECT after
a failed authentication attempt. It remains stuck
in that state for 10 seconds.

Fixes Bug #1321057
Now mxosrvr state is immediately set to AVAILABLE.

2.DCS child server state is set to CONNECTED even
after user gets "*** ERROR[8837] Internal error
occurred" during authentication (e.g. due to
wrongly configured .traf_authentication_config).

Now mxosrvr state is set to AVAILABLE after the
error is returned to the user.

Change-Id: I55131a2ea6dfb362e6560c86b0398e7ba9e1cc2b
Merge "1.DCS child server state remains as CONNECT_REJECT"