Meta server: set chunk server authentication required flag default to true if chunk server authentication is enabled.
Client library: emit error message and declare "fatal" failure in the case if ssl filter (openssl) initialization fails. Fix kfs net client to set authentication context pointer in start method.
Qfs C bindings: fix unit test to work with authentication enabled, by closing and re-opening the file descriptor at the end of write test in order to relinquish chunk write lease, to allow stat to get file size from the meta or chunk server, if needed, by acquiring read lease. With authentication off the code file size calculation logic request chunk size from the chunk server without acquiring read lease.
Qfs test: implement test with authentication on. For now use X509 authentication for all components. The default is authentication off, at least for now, as the code doesn't yet pass all the tests.