BVAL-344 BVAL-386 rework CDI section to remove implementation details
BVAL-344 BVAL-386 rework CDI section to remove implementation details

Also clarify that
- when CDI and BV integrates, rules are mandatory
- in Java EE CDI and BV must integrate

beanvalidation/beanvalidation-spec,beanvalidation/beanvalidation-spec,gunnarmorling/beanvalidation-spec,gunnarmorling/beanvalidation-spec,gunnarmorling/beanvalidation-spec,beanvalidation/beanvalidation-spec