bugfix: fix the mount path of tmpfs volume and some misspells

[shaloulcy]

The tmpfs volume is now mounted in the /etc/docker/plugins/tmpfs. It
should be mounted in /mnt/tmpfs

Signed-off-by: Eric Li [email protected]

Ⅰ. Describe what this PR did

The tmpfs volume is now mounted in the /etc/docker/plugins/tmpfs. It
should be mounted in /mnt/tmpfs

fix some misspells

Ⅱ. Does this pull request fix one issue?

NONE

Ⅲ. Describe how you did it

Ⅳ. Describe how to verify it

1. create tmpfs volume

root@ubuntu-1:~# pouch volume create -d tmpfs -n tmp_vol1
CreatedAt:    2018-4-28 11:17:36
Driver:       tmpfs
Labels:       map[]
Mountpoint:   /mnt/tmpfs/tmp_vol1
Name:         tmp_vol1
Scope:        
Status:       map[sifter:Default]

2. run container with the volume

root@ubuntu-1:~# pouch run -v tmp_vol1:/test -d reg.docker.alibaba-inc.com/redis
3a841472c493934885cbed99dd56c75ac48fbfaa32a9f3626e5e9701d5cb82a0

3. see the mount path

root@ubuntu-1:~# mount |grep tmp_vol1
shm on /mnt/tmpfs/tmp_vol1 type tmpfs (rw,nosuid,nodev,noexec,relatime,size=0k)

Ⅴ. Special notes for reviews

[codecov-io]

Codecov Report

Merging #1251 into master will increase coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1251      +/-   ##
==========================================
+ Coverage   15.27%   15.36%   +0.08%     
==========================================
  Files         172      172              
  Lines       10691    10629      -62     
==========================================
  Hits         1633     1633              
+ Misses       8938     8876      -62     
  Partials      120      120

Impacted Files	Coverage Δ
daemon/mgr/volume.go	0% <ø> (ø)	⬆️
daemon/mgr/network.go	3.47% <0%> (-0.01%)	⬇️
cli/cli.go	0% <0%> (ø)	⬆️
daemon/mgr/container.go	0% <0%> (ø)	⬆️
cli/run.go	0% <0%> (ø)	⬆️
cli/update.go	0% <0%> (ø)	⬆️
daemon/config/config.go	10% <0%> (+2.1%)	⬆️

[rudyfly]

LGTM