Yangtools build fails with test:

1) clone fresh yangtools
2) clean .m2/repository
3) mvn clean install

logs: http://pastebin.com/cXzpkufg

yang-maven-plugin-it failed. It also failed at the same place when I run auto-release scripts.

[INFO] ietf-restconf ..................................... SUCCESS [4.748s]
[INFO] restconf-test-service ............................. SUCCESS [0.048s]
[INFO] websocket-aggregator .............................. SUCCESS [0.013s]
[INFO] yang-maven-plugin-it .............................. FAILURE [1:02.047s]
[INFO] yang-aggregator ................................... SKIPPED
[INFO] yangtools-aggregator .............................. SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 5:41.698s
[INFO] Finished at: Fri Sep 05 19:17:35 PDT 2014
[INFO] Final Memory: 409M/1467M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-failsafe-plugin:2.16:verify (default) on project yang-maven-plugin-it: There are test failures.
[ERROR]
[ERROR] Please refer to /home/gzhao/OpenDaylight/yangtools/yang/yang-maven-plugin-it/target/surefire-reports for the individual test results.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :yang-maven-plugin-it