Add missing test dependencies in SDK

Using Nuxeo IDE (latest dev version 1.2.6.x)
Using latest major eclipse release (mars.2)
Using Nuxeo Platform 8.3-SNAPSHOT SDK from July 1st, 2016

• Generate a new Nuxeo project using the Nuxeo generator, compile it, import it into eclipse, convert it to a Nuxeo project
• Create unit tests
• Launch the unit tests

Tests cannot be launched, because some dependencies are not found in the SDK:

• org.jmock:jmock:2.5.1:jar::test
• org.jmock:jmock-junit4:2.5.1:jar::test
• org.mongodb:mongo-java-driver:3.2.2:jar::test

This does not happen if synchronizing the pom and launching the tests through Maven.