Undertow mod_cluster CLI: Display balancer's stickySession, stickySessionRemove, stickySessionForce, waitWorker and maxattempts properties

As a follow up to JBEAP-215, this bug report is a member of a series addressing CLI management capabilities. It is of Minor priority though.

Display balancer's stickySession, stickySessionRemove, stickySessionForce, waitWorker and maxattempts properties

At the moment, this is all there is to see as far as balancer runtime configuration goes:

"balancer" => {
    "qa_balancer" => {"node" => {"worker-2" => {
        "load" => 89,
        "status" => "NODE_UP",
        "context" => {"/clusterbench" => {
            "requests" => 0,
            "status" => "enabled"
        }}
    }}},
...

Call to action

Display runtime configuration properties for each balancer; especially these concerning session stickiness. It would help users debug their complex highly available environments without having to dauntingly parse DEBUG logs.