Revise tests where dependent beans are destroyed manually

For instance, org.jboss.cdi.tck.tests.implementation.producer.method.definition.ProducerMethodDefinitionTest#testStaticDisposerMethod() is not quite correct. See also http://lists.jboss.org/pipermail/cdi-dev/2014-June/005077.html.

Consider using a special util class org.jboss.cdi.tck.util.DependentInstance.