openflow_acl_test: replace lynx with curl for checking website status

As lynx is not easy to install, so curl is a better alternative.
Signed-off-by: NPei Zhang <pezhang@redhat.com>

qemu/tests/cfg/openflow_acl_test.cfg

@@ -14,7 +14,7 @@
             target_port = 80
             prepare_cmd_linux = echo "autotest page" > /var/www/html/autotest-test.html
             cleanup_cmd_linux = rm -rf /var/www/html/autotest-test.html
-            access_cmd_linux = lynx --dump http://ACCESS_TARGET/autotest-test.html
+            access_cmd_linux = curl -L http://ACCESS_TARGET/autotest-test.html --connect-timeout 10
             access_cmd_windows = cd C:\lynx && C:\lynx\lynx.exe --dump http://ACCESS_TARGET/autotest-test.html
             setup_cmd_windows = start /w pkgmgr /iu:IIS-WebServerRole;IIS-WebServer
             prepare_cmd_windows = echo "autotest page" > C:\inetpub\wwwroot\autotest-test.html
@@ -76,7 +76,7 @@
             ftp:
                 setup_targets = localhost
             website:
-                access_cmd_linux = lynx --dump www.redhat.com
+                access_cmd_linux = curl -L www.redhat.com --connect-timeout 10
                 access_cmd_windows = cd C:\lynx && lynx.exe --dump www.redhat.com
             ssh, telnet:
                 vms += " virt-tests-vm2"