OWB-893 fix generics rules

We have to treat standard InjectionPoints of generics a bit different
as the cdi-1.1 spec wording is broken. See CDI-389 for the change on the spec.
This is basically a rollback from 'assignable from' to 'assignable to' in 
section 5.2.3


git-svn-id: https://svn.apache.org/repos/asf/openwebbeans/trunk@1520121 13f79535-47bb-0310-9956-ffa450edef68