Added ikev2/rw-eap-framed-ip-radius scenario

testing/tests/ikev2/rw-eap-framed-ip-radius/description.txt

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+The roadwarriors <b>carol</b> an <b>dave</b> set up a connection to gateway
+<b>moon</b>. At the outset the gateway authenticates itself to the client by
+sending an IKEv2 <b>RSA signature</b> accompanied by a certificate.
+<b>carol</b> and <b>dave</b> then use the <b>EAP-MD5</b> protocol to authenticate
+against the gateway <b>moon</b>.
+<p/>
+The roadwarriors <b>carol</b> and <b>dave</b> request a virtual IP which is
+assigned by the RADIUS server <b>alice</b> using the <b>Framed-IP-Address</b>
+RADIUS attribute.