Add events to namespaced roles

[ukclivecox]

What this PR does / why we need it:

Fixes namespaced RBAC for manager

Which issue(s) this PR fixes:

Fixes #2179

Special notes for your reviewer:

[ukclivecox]

/test integration

[ukclivecox]

/test notebooks

[seldondev]

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

Test name	Commit	Details	Rerun command
notebooks	fd90d0d	link	/test notebooks
integration	fd90d0d	link	/test integration

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[axsaucedo]

Looks good - all integration tests pass, only failed ones are being covered via #3856 & #3857
/approve

[seldondev]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: axsaucedo

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