nwfilter: remove bogus 'protocolid' attribute on arp/rarp fields

Various example XML documents for arp/rarp filtering have a protocolid
XML attribute defined. This is never parsed or output by the libvirt XML
handling code, so shouldn't be present in example XML files either
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

tests/nwfilterxml2firewalldata/arp.xml

@@ -2,7 +2,6 @@
   <uuid>5c6d49af-b071-6127-b4ec-6f8ed4b55335</uuid>
   <rule action='accept' direction='out'>
      <arp srcmacaddr='1:2:3:4:5:6' srcmacmask='ff:ff:ff:ff:ff:ff'
-          protocolid='arp'
           dstmacaddr='aa:bb:cc:dd:ee:ff' dstmacmask='ff:ff:ff:ff:ff:ff'
           hwtype='12'
           protocoltype='34'

tests/nwfilterxml2firewalldata/rarp.xml

@@ -2,7 +2,6 @@
   <uuid>5c6d49af-b071-6127-b4ec-6f8ed4b55335</uuid>
   <rule action='accept' direction='out'>
      <rarp srcmacaddr='1:2:3:4:5:6' srcmacmask='ff:ff:ff:ff:ff:ff'
-           protocolid='rarp'
            dstmacaddr='aa:bb:cc:dd:ee:ff' dstmacmask='ff:ff:ff:ff:ff:ff'
            hwtype='12'
            protocoltype='34'

tests/nwfilterxml2xmlin/arp-test.xml

@@ -2,7 +2,6 @@
   <uuid>5c6d49af-b071-6127-b4ec-6f8ed4b55335</uuid>
   <rule action='accept' direction='out'>
      <arp srcmacaddr='1:2:3:4:5:6' srcmacmask='ff:ff:ff:ff:ff:ff'
-          protocolid='arp'
           dstmacaddr='aa:bb:cc:dd:ee:ff' dstmacmask='ff:ff:ff:ff:ff:ff'
           hwtype='12'
           protocoltype='34'

tests/nwfilterxml2xmlin/chain_prefixtest1.xml

@@ -2,7 +2,6 @@
   <uuid>e5700920-a333-4c05-8016-b669e46b7599</uuid>
   <rule action='accept' direction='out'>
      <arp srcmacaddr='1:2:3:4:5:6' srcmacmask='ff:ff:ff:ff:ff:ff'
-          protocolid='arp'
           dstmacaddr='aa:bb:cc:dd:ee:ff' dstmacmask='ff:ff:ff:ff:ff:ff'
           hwtype='12'
           protocoltype='34'

tests/nwfilterxml2xmlin/rarp-test.xml

@@ -2,7 +2,6 @@
   <uuid>5c6d49af-b071-6127-b4ec-6f8ed4b55335</uuid>
   <rule action='accept' direction='out'>
      <rarp srcmacaddr='1:2:3:4:5:6' srcmacmask='ff:ff:ff:ff:ff:ff'
-           protocolid='rarp'
            dstmacaddr='aa:bb:cc:dd:ee:ff' dstmacmask='ff:ff:ff:ff:ff:ff'
            hwtype='12'
            protocoltype='34'