The definitionsMap in WSDLManagerImpl holds the WSDLDefinitions against a weak key, again relying
on the WeakHashMap semantics for removal.
The loadDefinition(String) method loads the WSDLDef and puts this in a map
against a String key. But this String key, is a literal String and will be
present in the constant pool, where garbage collection never happens. This
would mean the key would always be referenced from the constant pool, and
the entry would never be removed.