[MNG-7022] Remove o.a.m.lifecycle.mapping.Lifecycle optional mojos backward compat code

Disable test which still declares optional mojos. The test runs fine
when optional mojos are removed from components.xml.

This closes #79
diff --git a/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4338OptionalMojosTest.java b/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4338OptionalMojosTest.java
index 4d931b4..848cf57 100644
--- a/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4338OptionalMojosTest.java
+++ b/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4338OptionalMojosTest.java
@@ -35,7 +35,7 @@
 
     public MavenITmng4338OptionalMojosTest()
     {
-        super( "[3.0,)" );
+        super( "[3.0,4.0.0-alpha-1)" );
     }
 
     /**