Assembler.java: Internalize synchronization - To ensure both static (class) and instance locks occur.
StatefulConcurrencyTest.java: Notification of expected errors.
StatefulConcurrentLookupTest.java: Reduce thread count and notification of expected errors.
DynamicEJBImplTest.java: Reduce some test warnings (no-arg constructors) and notification of expected errors

git-svn-id: https://svn.apache.org/repos/asf/tomee/tomee/trunk@1463877 13f79535-47bb-0310-9956-ffa450edef68