[JENKINS-19179] - Allow internal API calls, which disable the project.

This change provides the compatibility with project deletion flows, which disable configurations/projects before the deletion.
All specified values will be replaced by the current status of the parent project.

Signed-off-by: Oleg Nenashev <o.v.nenashev@gmail.com>

src/main/java/hudson/matrix/MatrixConfiguration.java

@@ -117,10 +117,7 @@ public final boolean isDisabled() {
 
     @Override
     public final void makeDisabled(boolean b) throws IOException {
-        if (/**disable*/ b) {
-            throw new Error("Matrix configurations cannot be disabled separately. Disable the parent project instead");
-        }
-        super.makeDisabled(b);
+        super.makeDisabled(getParent().isDisabled());
     }
 
     @Override