Comparison between java.util.Date & java.sql.Timestamp errors out in specific cases

[blitzmohit]

Inmemory comparison between java.util.Date & java.sql.Timestamp throws an exception when the ISO8601DateSerde is registered to handle these.

Expected Behavior

The comparison in such cases should not throw an exception

Current Behavior

Observed in cases where the incoming string filter is converted into Date and compared with a Timestamp, currently the conversion fails since the registered serde does not handle Date to Timestamp conversion.

Convert type 'java.util.Date' value 'Mon Sep 14 22:00:00 EDT 2020' to type 'java.sql.Timestamp'
 Using converter com.yahoo.elide.utils.coerce.CoerceUtil$1@50fa99c0
java.lang.ClassCastException: class java.util.Date cannot be cast to class java.lang.String (java.util.Date and java.lang.String are in module java.base of loader 'bootstrap')
	at com.yahoo.elide.utils.coerce.converters.ISO8601DateSerde.deserialize(ISO8601DateSerde.java:18)
	at com.yahoo.elide.utils.coerce.CoerceUtil$1.convert(CoerceUtil.java:71)