Update MetadataFeature.php

This minor change enables to use the MetadataFeature being used on Views rather than Tables only. Should be reviewed by author to ensure this is on the right place.
Update MetadataFeature.php

trailing spaces removed
TableGateway\Feature\EventFeature

TableGateway\Feature\EventFeature adds its generic identifier instead of setting it. This enables preconfigured eventmanagers, eg. from a TableGateway factory, being injected into the Feature over the constructor without completely resetting its identifiers.
Merge branch 'ralphschindler-feature/db-sql-select-union'
PR #4558
Merge branch 'master' of git://github.com/sarge-ch/zf2 into sarge-ch-master
Forward #4558 to develop
Merge branch 'sarge-ch-master' into develop