Wrap ipfw test in SKIPTEST block.

include/tests_firewalls

@@ -276,6 +276,7 @@
     # Test        : FIRE-4530
     # Description : Check ipfw (FreeBSD)
     Register --test-no FIRE-4530 --os FreeBSD --weight L --network NO --description "Check ipfw status"
+    if [ ${SKIPTEST} -eq 0 ]; then
         if [ ! "${SYSCTLBINARY}" = "" ]; then
             # For now, only check for IPv4.
             FIND=`${SYSCTLBINARY} net.inet.ip.fw.enable | awk '{ print $2 }'`
@@ -300,6 +301,7 @@
             Display --indent 2 --text "- Checking ipfw" --result SKIPPED --color YELLOW
             ReportException "${TEST_NO}:4" "No IPFW test available (sysctl missing)"
         fi
+    fi
 #
 #################################################################################
 #