Roll back to old date time validator

[huggsboson]

Allow people to still use the new formatter via the mechanism described
in example 8.

fixes #261

[dantran]

could you deploy a snapshot? I can test it out

[huggsboson]

should be a 2.2.10-SNAPSHOT

[huggsboson]

yeah I see this one out there:

<dependency>
  <groupId>com.github.java-json-tools</groupId>
  <artifactId>json-schema-validator</artifactId>
  <version>2.2.10-SNAPSHOT</version>
</dependency>

[dantran]

it works!! thanks for the quick response

[huggsboson]

json-schema-core 1.2.10 and json-schema-validator 2.2.10 should be out soon with this fix.