update instance family from m4 to m5

[jeremyeder]

/hold

Issue for discussion of merits of changing default instance family to m5.

@smarterclayton @gnufied @crawford @abhinavdahiya @wking

[openshift-ci-robot]

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[gnufied]

Just to summarize discussion from Slack. We still have some open issues around nvme driver in Linux kernel that rhel7 ships with. We are currently running a hotfixed version of kernel in some clusters and that did fix most of the problems but at least one customer has reported that even with hotfixed kernel they could reproduce the issue(I myself haven't verified it) - https://bugzilla.redhat.com/show_bug.cgi?id=1658237

[openshift-ci-robot]

@jeremyeder: The following tests failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
ci/prow/e2e-aws	11d42a5	link	/test e2e-aws
ci/prow/images	11d42a5	link	/test images

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[openshift-ci-robot]

@jeremyeder: PR needs rebase.

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[wking]

Obsoleted by #1163.

/close

[openshift-ci-robot]

@wking: Closed this PR.

In response to this:

Obsoleted by #1163.

/close

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