Use subprocess based method to read shared files

* Avoid reading NFS shared files with `open` directly, because when NFS is not available(head node down) `open` call will hang forever.
* Use `subprocess.run`, which has built in timeout functionality, to copy shared file to local first, or cat file directly
* This will prevent computemgtd from hanging even if NFS directories are not available

Signed-off-by: Rex <[email protected]>

Update changelog for 2.10.4

Signed-off-by: Enrico Usai <[email protected]>

Update changelog for 2.10.3

Signed-off-by: Francesco De Martino <[email protected]>

Update CHANGELOG for 2.10.2

Signed-off-by: Rex <[email protected]>

Update changelog for 2.10.1

Signed-off-by: Francesco De Martino <[email protected]>

2.10.0 Changelog

Signed-off-by: Enrico Usai <[email protected]>

Changes to changelog for 2.9.0

Signed-off-by: Francesco De Martino <[email protected]>

Updated changelog for version 2.9.0

Signed-off-by: ddeidda <[email protected]>

Changelog for v2.8.1

Signed-off-by: Tim Lane <[email protected]>

Changelog v2.8.0

Signed-off-by: Tim Lane <[email protected]>