[WFCORE-6166] max-outbound-channels setting in remoting subsystem is not honored

[gaol]

Issue: https://issues.redhat.com/browse/WFCORE-6166

[wildfly-ci]

Hello, gaol. I'm waiting for one of the admins to verify this patch with /ok-to-test in a comment.

[gaol]

This PR tries to set the optionMap from the subsystem configuration to the EndpointBuilder which was missed before.

To fully solve the issue, it also needs jboss-remoting/jboss-remoting#270 to be included to respect that.

[yersan]

/ok-to-test

[wildfly-ci]

Core -> Full Integration Build 12061 outcome was FAILURE using a merge of e8b3e09
Summary: Tests failed: 1 (1 new), passed: 7232, ignored: 160 Build time: 03:31:57

Failed tests

org.wildfly.extension.undertow.UndertowSubsystem10TestCase.testRuntime: java.lang.AssertionError: expected:<1> but was:<0>
	at org.wildfly.extension.undertow.AbstractUndertowSubsystemTestCase.testRuntime(AbstractUndertowSubsystemTestCase.java:176)
	at org.wildfly.extension.undertow.UndertowSubsystem10TestCase.testRuntime(UndertowSubsystem10TestCase.java:74)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

[fl4via]

This PR tries to set the optionMap from the subsystem configuration to the EndpointBuilder which was missed before.

To fully solve the issue, it also needs jboss-remoting/jboss-remoting#270 to be included to respect that.

The JBoss Remoting fix will be included in WildFly Core once #5312 is merged.