Auto-export module fails on auto export newly created namespace

Reproduction path:

• mvn org.apache.maven.plugins:maven-archetype-plugin:2.4:generate -DarchetypeRepository=https://maven.onehippo.com/maven2-snapshots -DarchetypeGroupId=org.onehippo.cms7 -DarchetypeArtifactId=hippo-project-archetype -DarchetypeVersion=12.0.2-SNAPSHOT
  (this error also occurs with the 12.0.1 release)
• cd myhippoproject
• mvn clean verify
• mvn -Pcargo.run
• Open http://localhost:8080/cms, login with admin/admin
• Make sure auto-export is enabled on the left of the screen. Should be enabled by default.
• Go to Content, Document Types (from the dropdown), Create Namespace: "mynamespace" with url "http://www.onehippo.org/mynamespace/1.0"
• The new namespace is not auto-exported and a NPE is shown in the logs, see below. See attached stacktrace.txt for full stacktrace.

  [INFO] [talledLocalContainer] 12:32:46 INFO  autoexporting source: myhippoproject/myhippoproject/myhippoproject-repository-data-application [config: main.yaml]
  [INFO] [talledLocalContainer] 03.10.2017 12:32:46 ERROR pool-9-thread-1 [EventJournalProcessor.processEvents:375] Failure writing files during auto-export -- files on disk may not be valid!
  [INFO] [talledLocalContainer] 12:32:46 INFO  autoexport service disabled, processing remaining changes
  [INFO] [talledLocalContainer] 12:32:46 ERROR Processing events failed: 
  [INFO] [talledLocalContainer] java.lang.NullPointerException: null
  [INFO] [talledLocalContainer] at org.onehippo.cm.model.mapper.NtFileMapper.apply(NtFileMapper.java:30) ~[hippo-configuration-management-model-1.0.2-SNAPSHOT.jar:1.0.2-SNAPSHOT]
  [INFO] [talledLocalContainer] at org.onehippo.cm.model.mapper.ValueFileMapperProvider.lambda$generateName$0(ValueFileMapperProvider.java:63) ~[hippo-configuration-management-model-1.0.2-SNAPSHOT.jar:1.0.2-SNAPSHOT]
  ...