tests: Use correct arguments to curl.

The commit in the fixes tag erroneously changed the
`--disable-epsv` argument to `--disable-eps`, which does
not exist.

Curiously the version of curl in the GitHub Actions images
appears to accept the abbreviated option, whereas more recent
versions of curl will fail with a hard error code 2.

Fixes: 249a9b5 ("system-traffic: Fix syntax errors in FTP and IPv6 curl calls.")
Signed-off-by: Frode Nordahl <[email protected]>
Signed-off-by: Eelco Chaudron <[email protected]>

Author: fnordahl

tests/system-common-macros.at

@@ -280,7 +280,7 @@ m4_define([OVS_GET_HTTP],
 #
 m4_define([OVS_GET_FTP],
     [curl ftp://$1 --retry 3 --max-time 1 --retry-connrefused \
-        --disable-eps -v $2]
+        --disable-epsv -v $2]
 )
 
 # OVS_GET_FTP_ACTIVE([url], [optional_curl_arguments])