Administration / Import / Restore the capability to load subtemplates.

 * Update batch import and metadata import page in order to set the record type (metadata, template or subtemplate).
 * The record type can only be set for XML records (not MEF).
 * Subtemplate can only match ISO19139 schema. Only support CI_ResponsibleParty for the time being which is the main use case.
Merge pull request #134 from fxprunayre/improvement/import-subtemplate

Administration / Import / Restore the capability to load subtemplates.