Alfresco Connector needs to invoke the ingestDocument for each d:content property of a node

The connector now supports only a single content stream for each document (Alfresco node).
But using custom content models it is possible to create a new type of node that could have more than one content stream attached.

There also is the issue that we need to invoke the ingestDocument method to correctly ingest documents.

The idea is based on invoke the ingestDocument method for each content stream included in an Alfresco node with the same properties.

In this way any type of node that includes in its own definition more than one d:content property (binary type of property in Alfresco) can be correctly ingested by ManifoldCF.