[WFCORE-5966] Rename WildflyTestRunner to WildFlyRunner

[soul2zimate]

Issue: https://issues.redhat.com/browse/WFCORE-5966

Rename WildflyTestRunner to WildFlyRunner; create and deprecate a new WildflyTestRunner subclass

[wildfly-ci]

Core -> Full Integration Build 11732 outcome was FAILURE using a merge of 2ce901d
Summary: Tests failed: 1 (1 new), passed: 7235, ignored: 148 Build time: 03:52:44

Failed tests

org.wildfly.extension.undertow.ServerServiceTestCase.testDefinedDefaultAttributes2: java.lang.AssertionError: expected:<1> but was:<0>
	at org.wildfly.extension.undertow.ServerServiceTestCase.testDefinedDefaultAttributes2(ServerServiceTestCase.java:126)
	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)

[bstansberry]

Thanks @soul2zimate