Reference: #8569 #8575

We tried with rhel 7.7 & vic 1.5.4 we are getting same issue.

Summary:
bootstrap.iso file builds successfully and containers could startup however, tether doesn't start (refer debug attached) and container fails with "docker: Error response from daemon: Server error from portlayer: unable to wait for process launch status: container VM has unexpectedly powered off."

vSphere and vCenter Server version
vSphere 6.7u2

VIC version
VIC Version: 1.5.4

@YanzhaoLi
@DanielXiao
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