Revert "ssa.c: In ssa_calculate_prdb, return original/current PRDB when ret != 1"

	This reverts commit 8f2ea673196879d456cb994db49377827d0a9f31.

	Access shouldn't return a PRDB pointer from access_member. It's Access's
	copy of PRDB and it manages it.
	Access should copy the PRDB before sending to Downstream.

	ACM reconnection case should be handled during CONN_DONE processing like
	it was done before changes in PRDB update flow.
ssa.c: Return original PRDB if ACM reconnects.

 The PRDB should be copied. Access shouldn't return PRDB pointer
 from access_member structure. Downstream and Access manage
 own copies of PRDB.