openqa-bootstrap: Prevent error about unknown hosts (boo#1245378)

Related bug report: https://bugzilla.suse.com/show_bug.cgi?id=1245378

Author: okurz

script/openqa-bootstrap

@@ -114,7 +114,7 @@ else
 fi
 echo -e "[auth]\nmethod = Fake" > /etc/openqa/openqa.ini.d/01-enable-fake-auth.ini
 
-if [[ -z $skip_suse_specifics ]] && ping -c1 download.suse.de. && (! rpm -q ca-certificates-suse); then
+if [[ -z $skip_suse_specifics ]] && ping -c1 download.suse.de. >/dev/null 2>&1 && (! rpm -q ca-certificates-suse); then
     # add internal CA if executed within suse network
     if ! zypper info ca-certificates-suse | grep -q ':'; then
         # add suse ca repo if needed