If fullPeriodicals = false then always return holdings information

Given fullPeriodicals = false
When holdings record has no items attached
Then still return holdings information
AND not an error message

Do not return this
<?xml version='1.0' encoding='UTF-8'?>
<instances>
<errors>
<error>
<message>Instance 82918535-77a3-4e87-8c8d-363feb1efd0a can not be retrieved</message>
<code>404</code>
</error>
</errors>
</instances>

Instead return this
<instances>
<holdings>
<instanceId>82918535-77a3-4e87-8c8d-363feb1efd0a</instanceId>
<holding>
<id>31afebfb-5ccb-4ae7-b749-e95dbbe6a03f</id>
<callNumber>Newspaper</callNumber>
<location>Regenstein, 2nd Floor Current Periodicals & Newspapers</location>
<status>Please contact library for access</status>
</holding>
</holdings>
</instances>

Additional acceptance criteria

• Verify no performance impact
• Write tests