util: don't use virFirewallRuleToString() to log the rule being applied
util: don't use virFirewallRuleToString() to log the rule being applied

Instead of separately building the commandline into a string to log,
just wait a few lines until we've built the virCommand object, and
call virCommandToString, which does the same thing.

(As a bonus, we were already calling virCommandToString to put the
commandline in a string in case of a failure when running it - from
the point of view of *that* usage, we're just moving the call to
virCommandToString *up* a few lines, i.e. we now only construct the
commandline string once.)

Signed-off-by: Laine Stump <c23361c43fbf79fed83e8b76173707b083d6caf5@redhat.com>
Reviewed-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>

libvirt/libvirt,zippy2/libvirt,jfehlig/libvirt,olafhering/libvirt,zippy2/libvirt,olafhering/libvirt,jfehlig/libvirt,jfehlig/libvirt,jfehlig/libvirt,zippy2/libvirt,olafhering/libvirt,libvirt/libvirt,zippy2/libvirt,libvirt/libvirt,olafhering/libvirt,libvirt/libvirt