res/res_pjsip_outbound_registration: Initialize auth_reject_permanent parameter

Prior to this patch, the auth_reject_permanent parameter was not initialized on
the registration client state, leading to the parameter being disabled
regardless of the value specified in pjsip.conf.

This patch initialized the setting on the registration client state to the
provided configuration value.

ASTERISK-24398 #close


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/12@424730 f38db490-d61c-443f-a65b-d21fe96a405b