fix metadata

[ukclivecox]

What this PR does / why we need it:

Fixes the port used for metadata and status requests

Which issue(s) this PR fixes:

Fixes: #4198

Fixes #

Special notes for your reviewer:

[seldondev]

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[axsaucedo]

/test integration

[axsaucedo]

/test notebooks

[axsaucedo]

Nice one - not sure how this wasn't caught before, looks good, triggered tests and will merge

[seldondev]

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

Test name	Commit	Details	Rerun command
integration	bafc1dc	link	/test integration

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