v1.4.1

This is the 1.4.1 release of tcmu-runner.

Release notes:

This is a bug fix release which fixes several issues hit with ESX initiators and the build system. For the latter zbc is now optionally built with the flags:

cmake .... -Dwith-zbc=false
or
cmake .... -Dwith-zbc=true

The short changelog is:

Jason Dillaman (2):
file_zbc: fixed compile error under ppc64le
file_zbc: optionally build zbc handler

Mike Christie (5):
Check if device is opened before calling handler
Fix pthread error handling
Drop in_lock_thread from __tcmu_reopen_dev
Allow some commands to run while taking lock
tcmu-runner: bump version to 1.4.1