Replace nc command with ncat

Ncat has better capabilities like SCTP which nc doesn't have.

Change-Id: I7a3a955465aa05032ead63459191167cfe3f98bd

neutron/tests/common/net_helpers.py

@@ -512,7 +512,7 @@ class NetcatTester(object):
             return True
 
     def _spawn_nc_in_namespace(self, namespace, address, listen=False):
-        cmd = ['nc', address, self.dst_port]
+        cmd = ['ncat', address, self.dst_port]
         if self.protocol == self.UDP:
             cmd.append('-u')
         if listen:

neutron/tests/contrib/functional-testing.filters

@@ -11,10 +11,7 @@ ping_kill: KillFilter, root, ping, -2
 
 # enable curl from namespace
 curl_filter: RegExpFilter, /usr/bin/curl, root, curl, --max-time, \d+, -D-, http://[0-9a-z:./-]+
-nc_filter: CommandFilter, nc, root
-# netcat has different binaries depending on linux distribution
-nc_kill: KillFilter, root, nc, -9
-ncbsd_kill: KillFilter, root, nc.openbsd, -9
+ncat_filter: CommandFilter, ncat, root
 ncat_kill: KillFilter, root, ncat, -9
 ss_filter: CommandFilter, ss, root
 

tools/configure_for_func_testing.sh

@@ -224,11 +224,12 @@ function _install_post_devstack {
 
     if is_ubuntu; then
         install_package isc-dhcp-client
-        install_package netcat-openbsd
+        install_package nmap
     elif is_fedora; then
         install_package dhclient
+        install_package nmap-ncat
     else
-        exit_distro_not_supported "installing dhclient package"
+        exit_distro_not_supported "installing dhclient and ncat packages"
     fi
 
     # Installing python-openvswitch from packages is a stop-gap while