INT-4042: Support Known Router Channels in Graph
JIRA: https://jira.spring.io/browse/INT-4042
```
...
}, {
"nodeId" : 24,
"name" : "integrationGraphServerTests.Config.router.router",
"stats" : {
...
}
},
"componentType" : "router",
"output" : "discards",
"input" : "four",
"routes" : [ "barChannel", "bazChannel" ],
"errors" : "myErrors"
}, {
...
"from" : 3,
"to" : 24,
"type" : "input"
}, {
"from" : 24,
"to" : 7,
"type" : "output"
}, {
"from" : 24,
"to" : 2,
"type" : "error"
}, {
"from" : 24,
"to" : 5,
"type" : "route"
}, {
"from" : 24,
"to" : 6,
"type" : "route"
...
```
Add Graph Support for RecipientListRouter
The RLR is not an AMMR; it's the only router outside of that class hierarchy.
Polishing
Add Dynamically Routed-to Channels to Graph
Add ExpressionBased and Expose Expression in Graph
Polishing
Add getExpressionString() to IOS
Add ExpressionCapable; Set Primary Expression
Polishing - PR Comments
Router/Expression Docs
* Simple Java Docs polishing
a30809be38