bugfix: rename lxcfs to pouch-lxcfs in pouch.rpm

[Letty5411]

Signed-off-by: letty letty.ll@alibaba-inc.com

Ⅰ. Describe what this PR did

Instead of offering lxcfs binary, pouch rpm offers a pouch-lxcfs binary to avoid conflict with users environment.

Ⅱ. Does this pull request fix one issue?

fix #1476

Ⅲ. Describe how you did it

1. change the liblxcfs.so to libpouchlxcfs.so in lxcfs source code.
2. remove files in share directory, which is used for LXC
3. rename lxcfs.service to pouch-lxcfs.service

Ⅳ. Describe how to verify it

Now rpm includes the following files:

#rpm -qlp pouch-1.0.0-1.el7.centos.x86_64.rpm
warning: pouch-1.0.0-1.el7.centos.x86_64.rpm: Header V4 RSA/SHA1 Signature, key ID 439ae9ec: NOKEY
/usr/bin/pouch-lxcfs
/usr/lib/systemd/system/pouch-lxcfs.service
/usr/lib/systemd/system/pouch.service
/usr/lib64/libpouchlxcfs.so
/usr/local/bin/containerd
/usr/local/bin/containerd-release
/usr/local/bin/containerd-shim
/usr/local/bin/containerd-stress
/usr/local/bin/ctr
/usr/local/bin/pouch
/usr/local/bin/pouchd
/usr/local/bin/runc

start pouch-lxcfs service

#systemctl start pouch-lxcfs

[root@r10e16207.sqa.zmf /tmp]
#ps -aux|grep lxcfs
root      16303  0.2  0.0  95316  1036 ?        Ssl  11:17   0:00 /usr/bin/pouch-lxcfs /var/lib/pouch-lxcfs/
root      23888  0.0  0.0 234720  3084 ?        Ssl  Apr18   0:28 /usr/bin/lxcfs /var/lib/lxcfs/
root      32367  0.0  0.0 112668   960 pts/0    S+   11:17   0:00 grep --color=auto lxcfs

#ls /var/lib/pouch-lxcfs/
cgroup  proc

Start pouchd with lxcfs enabled:

pouchd --enable-lxcfs --lxcfs /usr/local/bin/pouch-lxcfs --lxcfs-home /var/lib/pouch-lxcfs

Verify lxcfs works:

#pouch run -it -m 500m busybox
/ # cd /proc/
1/        bus/      fs/       irq/      net/      self/     sysvipc/
acpi/     driver/   ipmi/     mpt/      scsi/     sys/      tty/
/ # cat /proc/meminfo
MemTotal:         512000 kB

Ⅴ. Special notes for reviews

[codecov-io]

Codecov Report

Merging #1490 into master will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #1490      +/-   ##
=========================================
+ Coverage   40.45%   40.5%   +0.04%     
=========================================
  Files         253     253              
  Lines       16466   16466              
=========================================
+ Hits         6662    6669       +7     
+ Misses       8948    8941       -7     
  Partials      856     856

Impacted Files	Coverage Δ
ctrd/image.go	79.42% <0%> (+2.85%)	⬆️
apis/server/utils.go	64.28% <0%> (+4.76%)	⬆️

[CodeJuan]

LGTM