EAP doc section 24.2.3. "Configure TCPPING" should be updated with FRAG3 instead of FRAG2

Issue description
Customer has done manual tcping clustering configuration.

He has followed Jboss EAP documentation, which is mentioning FRAG2 in the provided example [1].

By default, RH-SSO is configured with FRAG3 as protocol used for fragmentation.

Not having used FRAG3 but FRAG2 instead has led to major fragmentation and slowness issue on RH-SSO.

So should JBoss EAP documentation (section 24.2.3. Configure TCPPING) be updated with FRAG3 instead of FRAG2 ? 

JBoss EAP documentation providing example Frag2
24.2.3. Configure TCPPING [1]

~~~

# Define the socket bindings
/socket-binding-group=standard-sockets/remote-destination-outbound-socket-binding=jgroups-host-a:add(host=HOST_A,port=7600)
/socket-binding-group=standard-sockets/remote-destination-outbound-socket-binding=jgroups-host-b:add(host=HOST_B,port=7600)
batch
# Add the tcpping stack
/subsystem=jgroups/stack=tcpping:add
/subsystem=jgroups/stack=tcpping/transport=TCP:add(socket-binding=jgroups-tcp)
/subsystem=jgroups/stack=tcpping/protocol=TCPPING:add(socket-bindings=[jgroups-host-a,jgroups-host-b])
/subsystem=jgroups/stack=tcpping/protocol=MERGE3:add
/subsystem=jgroups/stack=tcpping/protocol=FD_SOCK:add
/subsystem=jgroups/stack=tcpping/protocol=FD_ALL:add
/subsystem=jgroups/stack=tcpping/protocol=VERIFY_SUSPECT:add
/subsystem=jgroups/stack=tcpping/protocol=pbcast.NAKACK2:add
/subsystem=jgroups/stack=tcpping/protocol=UNICAST3:add
/subsystem=jgroups/stack=tcpping/protocol=pbcast.STABLE:add
/subsystem=jgroups/stack=tcpping/protocol=pbcast.GMS:add
/subsystem=jgroups/stack=tcpping/protocol=MFC:add
/subsystem=jgroups/stack=tcpping/protocol=FRAG2:add
# Set tcpping as the stack for the ee channel
/subsystem=jgroups/channel=ee:write-attribute(name=stack,value=tcpping)
run-batch
reload
~~~

RH-SSO using FRAG3 as default

RH-SSO 7.3 is specifying FRAG3 as default.

extract from standalone.xml (same with domain.xml and standalone-ha.xml) 

~~~
<stack name="tcp">
<transport type="TCP" socket-binding="jgroups-tcp"/>
<socket-protocol type="MPING" socket-binding="jgroups-mping"/>
<protocol type="MERGE3"/>
<protocol type="FD_SOCK"/>
<protocol type="FD_ALL"/>
<protocol type="VERIFY_SUSPECT"/>
<protocol type="pbcast.NAKACK2"/>
<protocol type="UNICAST3"/>
<protocol type="pbcast.STABLE"/>
<protocol type="pbcast.GMS"/>
<protocol type="MFC"/>
<protocol type="FRAG3"/>
</stack>
~~~

[1] https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.3/html/configuration_guide/configuring_high_availability