Version 1.4.0 release

[Gris Ge]

LibStorageMgmt version 1.4.0 released.

- Add Python3 support.
- Add support of lmiwbem.
- Allow plugin test to be run concurrently.
- Bug fixes:
* Fix megaraid plugin for dell PERC.
* Fix local disk rotation speed query on NVMe disk.
* Fix lsmcli incorrect try-expect on local disk query.
* Fix all the gcc compile warnings.
* Fix the obsolete usage of AC_OUTPUT in configure.ac.
- Library adds:
* Query serial of local disk:
lsm_local_disk_serial_num_get()/lsm.LocalDisk.serial_num_get()
* Query LED status of local disk:
lsm_local_disk_led_status_get()/lsm.LocalDisk.led_status_get()
* Query link speed of local disk:
lsm_local_disk_link_speed_get()/lsm.LocalDisk.link_speed_get()


https://github.com/libstorage/libstoragemgmt/releases/download/1.4.0/libstoragemgmt-1.4.0.tar.gz
sha1sum: 1a8f2d863e23efd6d88f81bb78a72d63ee925a9d