Mount netns as shared.
Mount netns as shared.

Since mount propagation is not supported in kubernetes API yet, we need
to set it as shared.

Also adds hostIPC for stackube-proxy.

Change-Id: Ie31761a12f169d9afde52e56b7068adaa8f2a127
Closes-Bug: 1710830
Signed-off-by: Pengfei Ni <5ba478f7e379e5026033ada2badb07ae28fac367@gmail.com>

mozhuli/stackube,mozhuli/stackube,mozhuli/stackube