tests: replaced explicit ports with random assignment

Signed-off-by: Nikos Mavrogiannopoulos <n.mavrogiannopoulos@gmail.com>

tests/test-gssapi-opt-pass

@@ -21,7 +21,6 @@ SERV="${SERV:-../src/ocserv}"
 srcdir=${srcdir:-.}
 builddir=${builddir:-.}
 NO_NEED_ROOT=1
-PORT=4439
 OUTFILE=test-gssapi-opt-pass.$$.tmp
 
 connect()
@@ -68,6 +67,8 @@ fi
 
 . `dirname $0`/common.sh
 
+eval "${GETPORT}"
+
 echo "Testing local backend with gssapi and password fallback... "
 
 VERBOSE=1