JavaHL should use the default cache size and let the FS backend decide
what it needs to cache.

* subversion/bindings/javahl/native/JNIUtil.cpp (JNIUtil::JNIGlobalInit):
   Leave the default cache sizes, but do signal that we're multi-threaded.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1547248 13f79535-47bb-0310-9956-ffa450edef68