NXP-13627: reset the thumbnail to null when updating a document main file
NXP-13555: replace nuxeo-distribution-tools with ant-assembly-maven-plugin
NXP-13555: build with Maven 3; add missing dependency on javax.servlet:javax.servlet-api
NXP-13555: add relativePath required in m3
NXP-13631: Add DocumentRelationManager to add a higher level API for Document Graph creation
NXP-13631: Split the DocumentRelationManager implementation
NXP-13631: Fix the removing of Document word in every method
NXP-13631: Fix relations refresh
NXP-13631: Fix relation delete
format
NXP-13653 decode scalar list property as Json in JsonDocumentModelReader