Bug description: Fix for Ticket #576 -
DNA: use event queue for config update only at the start up
(commit 7c11ed17796ba8b17afa5758fcfdf1c937b54ef4)
modified the timing of updating the shared config in the
database. The write operation was no need to be in the DNA
write lock, but it was located in it, which caused the dead-
lock.

Fix description: This patch releases the dna write lock before
updating the shared config in the database.