LU-7481 utils: label lustre device correctly

LU-7481 utils: label lustre device correctly

Currently, the device label will be read before mounting Lustre,
the flags LDD_F_VIRGIN and LDD_F_WRITECONF will be set according
to the label (the corresponding original flags containing in the
lustre_disk_data will be ignored). But the device label could be
changed during mount by the journal recovery, and the device should
be also labeled to indicate the target device is supposed to start.

Test-Parameters: testlist=conf-sanity,conf-sanity,conf-sanity

Change-Id: I2df1d81f764a7d1ffa26afb0197d137c057a25e9
Signed-off-by: Hongchao Zhang <hongchao.zhang@intel.com>
Reviewed-on: https://review.whamcloud.com/24845
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>