tree 8dbaac3a6030a002c3f40a2953a90716635e35c1
parent b1c7232b46ab33b20a9a44ef19a815be172e6c99
author lamber-ken <lamberken@apache.org> 1591619072 +0800
committer GitHub <noreply@github.com> 1591619072 +0200
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[BUG] Fix redundant statistics

### Motivation

Fix redundant statistics, run 5 bookies `bin/bookkeeper localbookie 10`, then show bookieinfo

```
./bin/bookkeeper shell bookieinfo
```

**Wrong result**
```
Free disk space info:
10.101.52.18(10.101.52.18):5004:        Free: 34930151424(34.93GB)      Total: 255850758144(255.85GB)
10.101.52.18(10.101.52.18):5003:        Free: 34930151424(34.93GB)      Total: 255850758144(255.85GB)
10.101.52.18(10.101.52.18):5002:        Free: 34930151424(34.93GB)      Total: 255850758144(255.85GB)
10.101.52.18(10.101.52.18):5000:        Free: 34930151424(34.93GB)      Total: 255850758144(255.85GB)
10.101.52.18(10.101.52.18):5005:        Free: 34930151424(34.93GB)      Total: 255850758144(255.85GB)
Total free disk space in the cluster:   174650757120(174.65GB)
Total disk capacity in the cluster:     1279253790720(1.279TB)
```

**Right result**
```
Free disk space info:
10.101.52.18(10.101.52.18):5004:        Free: 33172185088(33.172GB)     Total: 255850758144(255.85GB)
10.101.52.18(10.101.52.18):5003:        Free: 33172185088(33.172GB)     Total: 255850758144(255.85GB)
10.101.52.18(10.101.52.18):5002:        Free: 33172185088(33.172GB)     Total: 255850758144(255.85GB)
10.101.52.18(10.101.52.18):5006:        Free: 33172185088(33.172GB)     Total: 255850758144(255.85GB)
10.101.52.18(10.101.52.18):5005:        Free: 33172185088(33.172GB)     Total: 255850758144(255.85GB)
Total free disk space in the cluster:   33172185088(33.172GB)
Total disk capacity in the cluster:     255850758144(255.85GB)
```


Reviewers: Jia Zhai <zhaijia@apache.org>, Sijie Guo <None>, Enrico Olivelli <eolivelli@gmail.com>

This closes #2348 from lamber-ken/bk-info-command