The argument of 'insecure_registry' for image push has been removed
by this commit (in docker 3.0.0):
b180b8770a
Actually this argument was marked as deprecated and unfunctional
before this removing.
This commit is to remove this parameter at invoking the push() function
when docker version >= 3.0.0.
Change-Id: Ifa7d304d08a4073dcb1dff751d5a443c112cd377
Closes-Bug: #1746703