Meta server: fix setting effective group and user ids with psk authentication, by creating GetEUGid() method and using it for setting effective user and group ids from user name and user id.
Qfs test: change qfs tool test to allow to specify root user configuration and use it to perform operations that require root access, for example chown. Enable testing with authentication enabled by default if open ssl version is 1.0 or higher. Add delegation test, use delegation token with replicated files copy test.
Client lib: fix assertion in the qfs network protocol state machine, the connection pointer must not be null.
Test scripts: always validate certificates and private keys, even in the case if the private key already exits.