Adjusted database stop code to give more time to smart shutdown

On a slow raspberry pi 4 I found that the current smart and then immediate stop (immediate) did not work well.
The system needed more time.

Ticket: ENT-12750
Changelog: title

Author: craigcomstock

packaging/common/cfengine-hub/postinstall.sh

@@ -1056,7 +1056,10 @@ if [ -n "$httpds" ]; then
   fi
 fi
 
-(cd /tmp && su cfpostgres -c "$PREFIX/bin/pg_ctl stop -D $PREFIX/state/pg/data -m smart" || su cfpostgres -c "$PREFIX/bin/pg_ctl stop -D $PREFIX/state/pg/data -m fast")
+if ! (cd /tmp && su cfpostgres -c "$PREFIX/bin/pg_ctl stop -D $PREFIX/state/pg/data -m smart"); then
+  sleep 300
+  su cfpostgres -c "$PREFIX/bin/pg_ctl stop -D $PREFIX/state/pg/data -m fast"
+fi
 
 # Have to be careful here because httpd/php/bin wants to be root:root
 chown root:$MP_APACHE_USER $PREFIX/httpd/php