Treatments for parallel execution
synchronized filtered children in ParentRunner
simplified ClassRequest
Description#getChildren() JavaDoc
requested improvements in ParentRunner, + DCL in ClassRequest
// Guarded by fLock
changes with unmodifiable collections
shorten line, renamed var, removed unnecessary empty array in varargs.
getAnnotatedMethodValues/Field return modifiable collection: no internal data to protect
fChildrenLock, filter(Filter filter), fRunners
Guarded by fChildrenLock
renamed parameter to "fillIfAbsent"
Merge pull request #666 from Tibor17/junit.fix

Treatments for parallel execution