treewide: Fix recent flake8-check.

Without this patch, I see errors like this on master:
../ofproto/ipfix-gen-entities:115:1: E305 expected 2 blank lines after
class or function definition, found 1

Signed-off-by: Joe Stringer <[email protected]>
Acked-by: Daniele Di Proietto <[email protected]>

ofproto/ipfix-gen-entities

@@ -112,6 +112,7 @@ The following options are also available:
 """ % {'name': name})
     sys.exit(0)
 
+
 if __name__ == '__main__':
     try:
         options, args = getopt.gnu_getopt(sys.argv[1:], 'hV',

utilities/ovs-pcap.in

@@ -55,6 +55,8 @@ class PcapReader(object):
         if len(packet) != incl_len:
             raise PcapException("end of file reading pcap packet data")
         return packet
+
+
 argv0 = sys.argv[0]
 
 
@@ -70,6 +72,7 @@ The following options are also available:
 """ % {'argv0': argv0})
     sys.exit(0)
 
+
 if __name__ == "__main__":
     try:
         try:

utilities/ovs-tcpdump.in

@@ -67,6 +67,7 @@ def _install_tap_linux(tap_name):
         *(['ip', 'link', 'set', 'dev', str(tap_name), 'up']))
     pipe.wait()
 
+
 _make_taps['linux'] = _install_tap_linux
 _make_taps['linux2'] = _install_tap_linux
 

vtep/ovs-vtep

@@ -752,6 +752,7 @@ def main():
 
     unixctl.close()
 
+
 if __name__ == '__main__':
     try:
         main()