Enable thread timer cleanup
Enable thread timer cleanup

Uncommented code required to release thread timer resources

Resolves: LE-13449
Change-Id: I7e55cb3b6f498ea732c2f103f6e16cb7cb2c8224

legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af