8232881: Remove unnecessary InstanceKlass::casts Reviewed-by: coleenp

8232882: GCC 4.8.5 build failure after JDK-8211073 Reviewed-by: thartmann

8232625: HttpClient redirect policy should be more conservative Summary: When enabled, HttpClient redirect is fixed to drop the body when the request method is changed, and to relay any redirection code it does not understand to the caller. Reviewed-by: chegar