gfid-mismatch-dht-report.py : Avoid hardcoding of log file location

[PrasadDesala]

We should be sending the log file location as an arg or some other way instead of hard coding in the py file.
Also, with the current code gfid-mismatch-dht-report.py is passing though it failed to get the log file location.
We are checking for ,
{
output >0 --> Mismatch of gfid
else:
ctx.ok("no gfid mismatch")

Output of the command is is returning 0 when it failed , hence the script is passing with "no gifd mismatch". May be we should add some check first if the log file is present then grep for the string.

Output snip:

grep 'gfid differs' /var/log/glusterfs/mnt.log | grep -v grep | wc -l
grep: /var/log/glusterfs/mnt.log: No such file or directory
0

gluster-health-report --run-only gfid-mismatch-dht-report

Loaded reports: gfid-mismatch-dht-report

[ OK] no gfid mismatch