Revert GSI_DAEMON_DIRECTORY to be unset by default. #4390

Having a default value makes it harder to set X509_CERT_DIR and friends
via the environment of the Condor daemons.
Version check for command QUERY_JOB_ADS off by one. #4384

When the new CEDAR command QUERY_JOB_ADS was added, version checks were
added in the query client code to only use it if the schedd is known to
support it. But the version was off by one. It should be 8.1.5, not
8.1.4. One of the checks was fixed in the release where the command was
added, but two were missed.