avocado.utils.process: Log remaining buffer on exit

The SubProcess logs output only when it finishes with '\n' to avoid
partial outputs. Anyway we have to print the remaining buffer on
exit, otherwise we miss the unterminated output (eg on "echo -n")
Signed-off-by: NLukáš Doktor <ldoktor@redhat.com>

avocado/utils/process.py

@@ -350,10 +350,10 @@ class SubProcess(object):
                 if self.verbose:
                     bfr += tmp
                     if tmp.endswith('\n'):
-                        for l in bfr.splitlines():
-                            log.debug(prefix, l)
+                        for line in bfr.splitlines():
+                            log.debug(prefix, line)
                             if stream_logger is not None:
-                                stream_logger.debug(stream_prefix, l)
+                                stream_logger.debug(stream_prefix, line)
                         bfr = ''
             finally:
                 lock.release()