haystack in Zend\Validator\Inarray removed after remove other field

[weierophinney]

steps to reproduce:

• define fields: foo and bar
• bar field has Zend\Validator\Inarray, as we can't set haystack via GUI, then set manually at module.config.php
• remove foo field via GUI

actual result: "haystack" option in bar validator definitions removed.
expected result: "haystack" option in bar validator definitions should not be removed.

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Originally posted by @samsonasik at zfcampus/zf-apigility-admin-ui#138

[weierophinney]

@samsonasik I was looking on it, and it seems to be a bit more complex issue. It needs changes also in zf-apigility-admin. Basically we need add option haystack in validator_metadata config:
https://github.com/zfcampus/zf-apigility-admin/blob/master/config/module.config.php#L1400-L1403
but then also in admin-ui we need to add support for array option values (now it works only with bool/int/string)...

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Originally posted by @michalbundyra at zfcampus/zf-apigility-admin-ui#138 (comment)