HBX-2931 Pojo template cleanup.

[dareni]

Adjust freemarker pojo templates for uniform whitespace usage. ImportContextImpl - normalise line separators: remove carriage return char. Add a template for field annotations. Allow selection of field annotations over default property annotations by configuration of a toolclass property "hibernatetool.annotateField.toolclass". The class allocated to this property is not important only the name "annotateField". Tweak existing h2 database EntityNamingTest for testing of all the freemarker templates. Single line very minor deprecation fix to DocHelper for Column.getSqlType.

https://hibernate.atlassian.net/browse/HBX-2931

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