CA-378768: capture block schedulers

Signed-off-by: Mark Syms <mark.syms@citrix.com>

xen-bugtool

@@ -346,6 +346,7 @@ CAP_OEM                  = 'oem'
 CAP_PAM                  = 'pam'
 CAP_PROCESS_LIST         = 'process-list'
 CAP_PERSISTENT_STATS     = 'persistent-stats'
+CAP_SCHEDULER            = 'block-scheduler'
 CAP_SYSTEM_LOGS          = 'system-logs'
 CAP_SYSTEM_SERVICES      = 'system-services'
 CAP_TAPDISK_LOGS         = 'tapdisk-logs'
@@ -443,6 +444,8 @@ cap(CAP_XHA_LIVESET,         PII_MAYBE,                 max_size=10*KB,
     max_time=10)
 cap(CAP_YUM,                 PII_IF_CUSTOMIZED,         max_size=100*KB,
     max_time=30)
+cap(CAP_SCHEDULER,           PII_NO,                    max_size=100*KB,
+    max_time=30)
 
 ANSWER_YES_TO_ALL = False
 SILENT_MODE = False
@@ -765,6 +768,7 @@ exclude those logs from the archive.
     cmd_output(CAP_DISK_INFO, [SG_MAP, '-x'])
     func_output(CAP_DISK_INFO, 'scsi-hosts', dump_scsi_hosts)
     cmd_output(CAP_DISK_INFO, [LVDISPLAY, '--map'])
+    cmd_output(CAP_SCHEDULER, ['lsblk', '-o', 'SCHED,NAME'])
 
     # mdadm information
     cmd_output(CAP_DISK_INFO, [MDADM, '--detail-platform'])