Update aux.sh lvmwrapper

Update aux.sh lvmwrapper

Indent

Add valgrind support:
 env LVM_TEST_VALGRIND={0123} (the higher level, more commands tested)
 env LVM_TEST_CLVMD=1   runs clvmd within valgrind.
 env VALGRIND  script name executed for each lvm command (def. is valg).

Smarted teardown - should minimize occurence of left dev entries
 (using dmsetup remove -f only as last resort)
 sort removed devices by open count before actual removal

Use "" around string that may contain spaces.

Set log/verbose and activation/retry_deactivation to defined value.

Remove  debug.log after successful lvm command (easier to check output).