oeqa/utils: added new network module

A network module was added, and will contain network utility funcions for now.
with get_free_port that returns available network port in the system.

(From OE-Core rev: 72b336ad0d0a2994f00c57747686111a59fa8b29)

Signed-off-by: Francisco Pedraza <francisco.j.pedraza.gonzalez@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/utils/network.py

@@ -0,0 +1,8 @@
+import socket
+
+def get_free_port():
+    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    s.bind(('', 0))
+    addr = s.getsockname()
+    s.close()
+    return addr[1]