common: Fix FRU display error in log-util (facebook#98)

Summary:
FRU number always shows one digit even if there are two.
Modify the display rule to correct it.

Example:

Before modify:

1    scm      2018-10-17 02:09:45    sensord          ASSERT: Upper Non Critical threshold - raised - FRU: 12, num: 0x17 curr_val: 9024.00 RPM, thresh_val: 8500.00 RPM, snr: PSU2_FAN_SPEED
1    scm      2018-10-17 02:09:47    sensord          ASSERT: Upper Non Critical threshold - raised - FRU: 13, num: 0x24 curr_val: 9024.00 RPM, thresh_val: 8500.00 RPM, snr: PSU3_FAN_SPEED
1    scm      2018-10-17 02:09:48    sensord          ASSERT: Upper Non Critical threshold - raised - FRU: 14, num: 0x31 curr_val: 8992.00 RPM, thresh_val: 8500.00 RPM, snr: PSU4_FAN_SPEED

After modify:

12   psu2     2018-10-17 02:09:45    sensord          ASSERT: Upper Non Critical threshold - raised - FRU: 12, num: 0x17 curr_val: 9024.00 RPM, thresh_val: 8500.00 RPM, snr: PSU2_FAN_SPEED
13   psu3     2018-10-17 02:09:47    sensord          ASSERT: Upper Non Critical threshold - raised - FRU: 13, num: 0x24 curr_val: 9024.00 RPM, thresh_val: 8500.00 RPM, snr: PSU3_FAN_SPEED
14   psu4     2018-10-17 02:09:48    sensord          ASSERT: Upper Non Critical threshold - raised - FRU: 14, num: 0x31 curr_val: 8992.00 RPM, thresh_val: 8500.00 RPM, snr: PSU4_FAN_SPEED
Pull Request resolved: facebookexternal/openbmc.accton#98

Test Plan: Test on minipack: pass

Reviewed By: amithash

fbshipit-source-id: a28726d45

common/recipes-core/log-util/files/log-util.py

@@ -149,7 +149,7 @@ def log_main():
                 if re.search(r'FRU: [0-9]{1,2}', log, re.IGNORECASE):
                     fru_num = ''.join(re.findall(r'FRU: [0-9]{1,2}', log, re.IGNORECASE))
                     # FRU is in format "FRU: X"
-                    fru_num = fru_num[5]
+                    fru_num = fru_num.split(" ")[1]
                 else:
                     fru_num = '0'
 
@@ -199,7 +199,7 @@ def log_main():
                 if re.search(r'FRU: [0-9]{1,2}', log, re.IGNORECASE):
                     fru_num = ''.join(re.findall(r'FRU: [0-9]{1,2}', log, re.IGNORECASE))
                     # FRU is in format "FRU: X"
-                    fru_num = fru_num[5]
+                    fru_num = fru_num.split(" ")[1]
                 else:
                     fru_num = '0'