Silence Coverity warning in the autofs test tool https://fedorahosted.org/sssd/ticket/1237

Only free returned values on success https://fedorahosted.org/sssd/ticket/1237

AUTOFS: a command-line test client A very simply binary that can be used to test getting data from the library via SSSD in pretty much the same way SSSD would. A required positional parameter specifies the map name and the tool would print out all the key/value pairs using _sss_getautomntent_r(). You can also specify -n to query a specific key using _sss_getautomntbyname_r().