LU-5170 utils: Add utility and command name to llapi messages

LU-5170 utils: Add utility and command name to llapi messages

Allow error and info messages printed by llapi functions to
include the name of the utility and the command that caused
the error.  The command name is provided by the caller before
invoking any llapi functions through the use of the new function
llapi_set_command_name().  After the command has completed, the
utility should reset the name using llapi_clear_command_name().
If no command name is provided, only the utility name is printed.

The lfs and lctl utilities have been updated with the new functions.
They will print both the utility name and the command name while
in non-interactive mode.  In interactive mode, only the utility
name is printed.

Test-Parameters: trivial
Signed-off-by: Steve Guminski <stephenx.guminski@intel.com>
Change-Id: Ifaa1549f9bac6fdb25120f5721f69a8e1a7a52e1
Reviewed-on: https://review.whamcloud.com/28571
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>